To see the other types of publications on this topic, follow the link: Optical fiber alignment module.
Dissertations / Theses on the topic 'Optical fiber alignment module'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 28 dissertations / theses for your research on the topic 'Optical fiber alignment module.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Wang, Shih-Cheng. "Alignment tolerant, single-fiber, bi-directional link." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13841.
Full text
2
Ahmed, Samy, and Joel Björk. "Autonomous Alignment Between a Single Mode Optical Fiber and a Grating Coupler." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200581.
Full text
3
Zhang, Xuan ZHANG. "Polymer Films With Enhanced Through Thickness Optical Transmission and Compression Modulus with Electric Field Aligned Glass Fiber/Bubbles." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1463961142.
Full text
4
Mathieu, Frédérick. "Alignment tolerance study between VCSEL arrays and a new kind of ordered fiber array technology considered for two-dimensional parallel optical interconnects." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0035/MQ64237.pdf.
Full text
5
Sin-Di, Li, and 李信迪. "The Feasibility Study of Passive Alignment Packaging for Semiconductor Optical Amplifier (SOA) Module Using Bilateral-Fiber Coupling." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/23693337851220808227.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>機械工程系<br>91<br>This thesis utilizes mainly chemical etch to manufacture Lensed- Fiber, and use it to study passive alignment packaging of semiconductor optical amplifier(SOA) of making Bilateral-Fiber Coupling. At the manufacture of Lensed- Fiber, it raises selectiveness of fibered angle, and raises Optical Coupling efficiency of fiber to improve the core destruction by electric arc. The manufacture of single mode fiber(SMF125/9μm) by this study was highest about 30%, and the highest coupling efficiency of multi mode fiber was about 55%. Although single mode fiber could not get Loss lower than 3dB, it raised coupling efficiency of electric arc and higher than 20%. Electric arc was also close to the Lensed- Fiber of market, and even had better optical coupling efficiency. Using BOE etch silicon oxide layer reduced process time, but it had side etching. We could control it inside the line wide of need after using compensation. This study caused bigger damage by accumulative error of Bilateral-Fiber Coupling, although we couldn’t measure better gain. It can prove preliminary feasibility of Bilateral-Fiber Coupling.
Easy process adds higher optical coupling efficiency, and matching better process equipment will increase better efficiency of Alignment Packaging of SOA Module. We hope that Alignment Packaging of SOA Module can increase competition of communication market in the future.
6
Yen, Kung-Kun, and 嚴拱坤. "The Development of an Optical Fiber Alignment Machine." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/40169809747607709455.
Full textAbstract:
碩士<br>南台科技大學<br>機械工程系<br>93<br>This report introduces the development of an optical fiber alignment machine that has sub-micrometer precision. The structure of this machine includes machine vision, a power meter, a 5-degree-of-freedom (DOF) stage, and a PC. The machine vision is used to guide the 5 DOF stage to align optical fibers. The power meter is to fine-tune the alignment to ensure that the light power transmitted through aligned fibers reaches a preset level. The PC is the system controller, and a user-friendly man-machine interface is designed to monitor and control the alignment process. The resolution of machine components and operation procedure are reported in this article. Experiments are conducted to test the function of this machine. The results are satisfactory and some of them are presented in this report.
7
Hung, Ju Lin, and 林宏儒. "Fabrication of CXP Multimode Fiber Optical Transceiver Module." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/pp79dx.
Full textAbstract:
碩士<br>國立高雄應用科技大學<br>電子工程系碩士班<br>103<br>This thesis successfully developed the CXP multimode fiber optical transceiver module which can be applied in the 100GBASE-SR10 Ethernet. For the transmitter, we use a SiGe laser driver with a 850nm GaAs vertical cavity surface emitting laser array which have 12 channel and can reach 10Gb/s for each channel. For the receiver, we use a SiGe receiving IC with a 850nm GaAs photodiode array which also have 12 channel. We designed the whole structure by using Solidworks first and do the high-frequency transmission line characteristic analysis, as well as the impedance match calculation when we designed the printed circuit board layout. In order to make the signal more integrated, the coupled microstrip line have be used in high-frequency traces, and use FR4 to be our PCB material.
Finally, we measure our CXP optical transceiver, which contains LI curve, eye diagrams, bit error rate and crosstalk measurements. In the measurement, the transceiver is operated at signal pattern 231-1 and data rate of 10Gb/s. For the transmitter measurement, the peak-peak jitter, rising time, falling time, and Q-factor were 21.4, 35.7, 36.8ps, and 8.19, respectively. For the receiver back to back measurement, the peak-peak jitter, rising time, falling time, and Q-factor were 26.8, 49.1, 51.8ps, and 8.13, respectively. The sensitivity can reach to -7.5dBm. The result shows the parameters are all in accordance with specifications. We also compare to Avago CXP transceiver and the results also accounted for the advantage. All results prove that the CXP multimode fiber optical transceiver module we fabricate can be operated under the 100Gb / s digital transmission.
8
Yeh, Tzuoh-Chyau, and 葉作球. "Fiber Grating Filters and Optical Switching Module Applications." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/26284024675437117063.
Full textAbstract:
碩士<br>國立臺灣大學<br>電信工程學研究所<br>100<br>A single-mode fiber becomes a multimode fiber when cladding2 is added outside cladding1. The addition of cladding2 supports new applications, such as new long-period fiber gratings. Coupled Mode Theory and Transfer Matrix are principal to design and simulation fiber gratings. Types fiber grating are useful in modern optical communication. CDMA codeword could be map to wavelengths. That’s why optical CDMA switching works. Large bandwidth and high speed switch rate are meet characters of future telecommunication network requirements.
Light with a wavelength of 1310 nm wavelength is generated by a laser, and is coupled into SMF for traditional optical fiber communication. The lowest loss wavelength band of the SMF, which is around 1550 nm, is favored for telecommunication. The band from 1300 to 1620 nm of wavelength is in fact used for modern optical fiber communication. A bandwidth over 40 THz is available utilized. The full use of a sectionalized band is an issue of concern. Sectionalized bands satisfy Optical Code Division Multiple Access requirements. A white light source is modulated by user data and passed through the OCDMA coder. The white light source replaces a laser which is a narrow-band light source, for CDMA systems.
The huge signal bandwidth and low loss of optical fibers are of particular interest to optical communication engineers because of their potential importance in fiber optical applications. Studies of dynamic adjustable bandwidth and usage in each channel of a DWDM and OCDMA are advanced. Optical fiber signal process approaches can realize the optical fiber grating for filtering multiple wavelengths. Several methods can be utilized to make various gratings that can function as filters. These include Bragg gratings, chirped gratings, long-period gratings, Gaussian apodization gratings, phase-shift gratings, superstructure gratings and others. These are good for tailoring gratings with complicated superstructures. These investigate optical fiber grating for filtering multiple wavelengths. Step by step present to develop the long-period fiber grating multiple wavelength filters was described in this text.
Examples are considered to help understand fiber gratings and LPFG can be used in the development of multiple-wavelength filters. The first on the world with LPFG which cladding2 is added outside cladding1 is made of single-mode fiber and application of OCDMA 8X8 switching is realized using multiple-wavelength filtering of LPFG, as well as CDMA Optical Ethernet Adjacent Fiber Module works with duplex and half duplex mode simultaneously and OCDMA Expansion Connector of PC mother board. They are described in appendixes in this thesis.
9
li-wei, Chen, and 陳力維. "100 Gb/s SR4 Multimode Fiber Optical Transceiver Module." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/6r7fw5.
Full textAbstract:
碩士<br>國立高雄應用科技大學<br>電子工程系碩士班<br>103<br>With the advancement of information and communication technology, people increase demanding speed to get the message, therefore, the demand of high-speed short-range transceiver devices also increase in data exchange centers. A 100GBASE-SR10 optical transceiver module consists of 12 channels of each 10-Gb/s transceiver to achieve 100-Gb/s operation. The 100GBASE-SR4 is defined in IEEE 802.3bm standards, and uses four channels to achieve 100-Gb/s operation. We designed a transceiver module based on the IEEE 802.3bm specification. In our module, the transmitter uses a quad 28-Gb/s laser driver integrated circuit (IC) and an 850nm wavelength quad 25-Gb/s vertical cavity surface emitting laser (VCSEL) array. The receiver uses a quad 28-Gb/s receiver IC and an 850nm wavelength quad 25-Gb/s photodiode array. Two quad 28-Gb/s clock and data recovery (CDR) ICs are also used in the transceiver to improve the performance of input and output signals.
At last, the 100Gb/s SR4 multimode fiber optical transceiver. For transmitter measurement, the peak-peak jitter, rising time and falling time, were 14.092ps, 21.19ps and 20.45ps, respectively. For receiver measurement, the peak-peak jitter, rising time and falling time were 13.63ps, 20.27ps and 20.45ps, respectively. In the condition of bit error rate (BER) of 10-12, the sensitivity of receiver was 1.74dBm. In conclusion, it could enable the 100Gb/s SR4 multimode fiber optical transceiver to operate at 100Gb/s which has been proved from this result of measurement.
10
Wu, Meng-Yu, and 吳孟諭. "Optical fiber based pickup module for near-field recording." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/15666287110350920030.
Full textAbstract:
碩士<br>國立交通大學<br>光電工程所<br>91<br>Optical data storage technology plays a key role in the multimedia era. In systems such as DVD or future video-audio broadcast and information storage systems, the only way to realize ultrahigh quality multimedia broadcast and ultrahigh density information storage is to increase the storage density and obtain rapid access time of information.
Recently, MEMs technology has been discussed in many publications which cause much attention in its fabrication potential and commercial possibility. Meanwhile, a small-sized optical head to realize slim and portable devices is also a desired objective for future drive technology. Therefore, in this thesis, a near-field optical approach combining a 45o mirror chip and a SIL platform was proposed by MEMs approach. The reflectivity of the fabricated 45o mirror and influence upon the beam shape out of the fiber, were examined to prove the optical quality as a reliable component in an optical disk drive.
11
Lin, Cheng-Wei, and 林政緯. "A Study on Real-Time Vision-Based Optical Fiber Alignment." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/89160027443260733327.
Full textAbstract:
碩士<br>國立成功大學<br>電機工程學系碩博士班<br>94<br>Recently, fiber optic transmission has become one of the most popular choices for long-distance fixed communication links due to attractive features such as low cost and high bandwidth. However, to maintain high quality transmission, the development of a high precision alignment technique for optical fiber assembly cannot be overlooked. Therefore, this research focuses on developing a vision based optical fiber alignment platform that is actuated by a piezoelectricity device. The technique developed in this project can be divided into two parts. The first part is “servo control”. Since the piezoelectricity actuated device (PEA) is a nonlinear element with hysteresis property, this study proposes a feedforward inverse hysteresis controller based on a B-spline approximation model to eliminate the effects due to hysteresis. In addition, the integral variable structure controller (IVSC) is also adopted to reduce the error due to noise/parameter uncertainty. Experimental results indicate that the obtained step response can satisfy the design specifications. The second part is “vision”. The accuracy of the visual feedback signal will affect the performance of optical fiber alignment. In order to deal with this difficulty, a new visual servoing structure that combines the use of vision and position feedback and an image processing algorithm which requires less processing time and is more accurate are developed in this study. In addition, linear interpolation on vision command is performed, and a Kalman filter is also used to predict the visual command at the next time instant to cope with the visual latency problem. Experimental results show that the proposed approach exhibits satisfactory performance.
12
Fu, Zu-Yu, and 傅子瑜. "The Prediction of Power Loss in Optical Fiber Alignment Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/98nxmz.
Full textAbstract:
碩士<br>南台科技大學<br>機械工程系<br>93<br>ABSTRACT
Optical fiber alignment is a process used to joint two pieces of optical fibers together. Power meter is regularly employed to detect the power loss between two jointed fibers. If the power loss is above a preset level, then the alignment is invalid and must be reworked. This report studies two methods of predicting the power loss before the alignment is carried out, so that invalid alignment could be avoided. One method uses the roughness, depicted by fractal dimension, of the jointing faces of both fibers as a factor of indicating failure or not of the alignment. Another method uses both pitch and yaw angles between two alignment fibers to anticipate the possible power-loss range after alignment. Also this study considers the method of predicting the power loss after the optical fibers have been aligned, which could serve as a factor of assisting the decision making of rejecting the alignment or not before final bonding. Experiments are conducted to test the suggested methods with satisfactory results. Some of them are reported in this article.
13
Hsu, Yi-Cheng, and 許益誠. "A Study of Fiber Alignment Shift Measurement and Compensation in Laser Module Packages." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/56815780992137619631.
Full textAbstract:
博士<br>國立中山大學<br>光電工程研究所<br>93<br>The fiber alignment shifts induced by the post-weld-shift (PWS) in laser-welded TO(Transistor outline)-Can type laser module packages is studied experimentally and numerically. The PWS induced fiber alignment shifts were quantitatively determined by four geometrical parameters: the lateral shift(r), the position angle(α), the tilt angle(Ψ), and the swing angle(θ). The measured coupling powers in laser module packages before welding, after welding, and after a compensation clearly confirmed with the measured fiber alignment shifts determined by the dominant parameters of the r and α that the fiber shifts due to the PWS could be realigned back closer to their original optimum position after applying a welding compensation, and hence the coupling powers loss due to the PWS could be regained. The measured coupling efficiency after laser welding was from 68% to 95%, and the overall coupling efficiency after the PWS compensation was from 77% to 97%. The increased coupling efficiency after this PWS compensation was from 2% to16%. A coupled thermal-elasto-plasticity model of finite-element method (FEM) analysis was performed to evaluate the effects of PWS on fiber alignment shifts in laser module packages. The measured fiber alignment shifts determined by the dominant parameters of the r and α were in good agreement with the numerical calculation of the FEM analysis. In this study, the combination of the experimental and numerical results have significantly provided a practical design guideline for fabricating reliable laser-welded TO-Can type laser module packages with a high yield and high performance for use in low-cost lightwave transmission systems.
A novel measurement and compensation technique employing a high-magnification camera with image capturing system (HMCICS) to probe the post-weld-shift (PWS) induced fiber alignment shifts in high-performance butterfly-type laser module packages is investigated. The results show that the direction and magnitude of the fiber alignment shifts induced by the PWS in laser-welded butterfly-type laser module packaging can be quantitatively determined and then compensated. The measured coupling powers in laser module packages after welding and compensation clearly confirmed the measured fiber alignment shifts determined by the translational and rotational parameters that the fiber shifts due to the PWS could be realigned back closer to their original optimum position after applying a welding compensation, and hence the coupling powers loss due to the PWS could be regained. The measured coupling efficiency after laser welding was from 63% to 79%, and the overall coupling efficiency after the PWS compensation was from 69% to 89%. The increased coupling efficiency after this PWS compensation was from 3% to 10%. In comparison with previous studies of the PWS compensation by a qualitatively estimated technique in butterfly-type laser module packages, this novel HMCICS technique has significantly provided an important tool for quantitative measurement and compensation to the effect of the PWS on the fiber alignment shifts in laser module packages. Therefore, the reliable butterfly-type laser modules with a high yield and a high performance used in lightwave transmission systems can be developed and fabricated.
14
Hung, Tzu-Yu, and 洪子瑜. "Novel Structures of the Lensed Fiber for the Optical Transmitter Module." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/g4ny35.
Full textAbstract:
博士<br>國立中山大學<br>機械與機電工程學系研究所<br>95<br>This thesis researches in the structure and fabrication of lensed fibers. To begin with, a novel method for automating fiber endface polishing to form quadrangular-pyramid-shaped fiber endface (QPSFE)-like shape is presented. This system successfully supported automatic polishing with an encouraged fiber tip offset. Such an automatic polishing system can also be applied to any other type of fiber endface. Next, an advanced polishing method to form an elliptical microlens endface from a QPSFE-like shape fiber is proposed. There are many advantages of this approach. First, the process to remove the tip of the fiber can be omitted and be replaced by the proposed process. This would raise the yield of the manufacturing of the lensed fiber and reducing manufacturing time and eliminating the possibility of human error. Second, after the process of the proposed method, an elliptic microlens is formed on the end of fiber and the fusing step can be skipped. In addition, in optical module packaging, laser welding used to attach components is expected to cause relative motion between the pre-aligned components. Such shifts might considerably reduce the efficiency of light coupling. This thesis provides a particular method to measurement the fiber shifts along the three axes quickly and precisely.
Furthermore, the efficient coupling of plastic optical fibers (POFs) to the light source has become critical. Two kinds of new schemes of lensed optical fiber for POFs are proposed. The first type of lensed plastic optical fiber (LPOF) scheme is fabricating a convexo-concave-shaped fiber endface (CCSFE) by joining a flat-end POF and a convexo-concave plastic lens (CCPL). The second type of LPOF scheme is fabricating a hyperbola shape LPOF by using electrical force. Both designs of the LPOF all have advantages of easy fabrication and automatic manufacture.
15
Hsu, Chih-Yuan, and 許致遠. "A Research of Competitiveness on Plastic Optical Fiber Transmitting Module Industry." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/00064611439076935063.
Full textAbstract:
碩士<br>國立交通大學<br>國際經貿學程碩士班<br>91<br>Global POF communications market value in 1995 was approximately $100 million, $350 million in 2000, and expected to reach $700 million in 2006 — 7 times growth in 10 years. This research is dedicated to analyze the POF Transmitter market, which holds approximately one quarter of the total market value, and discuss the competitiveness and future of all the firms in the supply chain of this industry.
This research is focused on the interviews with 15 firms in the POF industry, supported with secondary data. The observation have discovered that many upper stream and down stream firms are building new strategic alliances, while old alliances are breaking up, therefore, it is apparent that the industry is re-organizing. Almost all of the top 3 firms before 2002 are being replaced in 2003.
The findings in this research shows that most of the LED Packaging firms do not posses much competitiveness in price or technical support, it is difficult for them to maintain their relationship with their suppliers and customers, while competing with both sides. Competition will only result in price deductions. Vertical integration lead by IC design firms with technical background or connector companies possessing end customers is the best way to exhibit strong competitiveness in the highly competing market.
16
Lee, Guo-You, and 李國右. "Application Research on the Optical Fiber Alignment Using A Piezoelectric Rotational Stage." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/38522818581283931577.
Full textAbstract:
碩士<br>國立高雄第一科技大學<br>系統與控制工程研究所<br>94<br>ABSTRACT
This thesis is aimed at constructing a three-DOF rotational precision positioning stage using spring-mounted piezoelectric (PZT) actuators for the applications in automatic assembly, alignment works, and examination works for miniaturized precision components. The driving principle of the positioning stage is to utilize the impact force caused by the rapid deformation of the PZT actuator for the actuation of the positioning stage, and utilize a compression spring to keep the continuous actuation by the PZT actuator. The advantages of using the spring-mounted PZT actuators are given as: (1) the positioning stage can be actuated with the moving ability featuring micro/nano-meter by the actuation of PZT impact force, (2) due to the combination of PZT actuator and spring, the continuous actuating ability for the positioning stage is obtained and thus with theoretical unlimited operational range. (3) since the actuation for PZT actuator is by a simple driving waveform of pulse, it is much easier to construct the electronic circuit, and (4)the positioning stage is easily to maintain due to the modularized design of the spring-mounted PZT actuator.
The research works on the thesis is based on the spring-mounted PZT actuator which features the advantages of nanopositioning ability and large operational range to design a modularized compact actuator, and then to implement a 3-DOF rotational stage. The experimental results show that the rational stage could be actuated with angular displacements of 0.72 μrad, 0.81 μrad, and 2.05 μrad along 3-axis of θx, θy , and θz due to the excitation pulse voltage 80 V. In addition, a practical application for the fiber alignment was examined. The coupling power was evaluated as 94.89% (-0.455dB). Finally, the Taguchi method was used to improve the alignment performance. According to SN ratio and ANOVA analysis, the most affecting parameter was found as the
material of fiber clamp, and the coupling power was improved to 95.87% (-0.367dB) based on the most suitable parametric combination.
17
Shenouda, Mikhail. "Temperature Effects in Optical Fiber Dispersion Compensation Modules." Thesis, 2013. http://hdl.handle.net/10012/7866.
Full textAbstract:
This thesis presents the results for the temperature variation of the Differential Group Delay (DGD) measurements of a Dispersion Compensation Module (DCM) and interprets the results with a theoretical DGD model based on glass viscoelastic properties and estimated values of some of glass parameters. The results of our analysis demonstrate the existence of long birefringence relaxation times on the order of many hours in response to temperature changes. These results could be of significance in interpreting the behavior of optical fiber systems.
18
Chu, Yu-hung, and 朱祐弘. "Fabrication of one-dimensional optical fiber array using a new active-alignment technique." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/586mh7.
Full textAbstract:
碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>96<br>This paper presents a novel active-alignment technique to fabricate one-dimensional optical fiber array. The advantages of this technique are providing simple structure on silicon- based optoelctronic device and individually adjusting relative position error of fiber array and laser diode array. The way to adjust fiber displacement is applying electric force to pull the adhesive which used to fix fibers and microholders. Then the adhesive has adhesive force with fiber surface that bring fiber moving away from its original position. The method has to consider some issues including choosing the adhesive viscosity, controlling adhesive volume in the microholder, confirming adjusting precision of fiber displacement, compensating the fiber Offset after curing. So we can obtain the minimum adjusting precision 0.5μm and control the fiber traveling distance at ±0.4μm. The way to improve those issues of adjusting the fiber array to achieve the best coupling position is described in this paper.
19
Chuang, Yu-Shu, and 莊育樹. "Applying Lensed-Fiber and Silicon Etching Technique for Researching on Passive Alignment Packaging of LD Module." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/29357582664394946846.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>機械工程系<br>90<br>This research is to develop a process for the optical sub-assembly packaging of Semiconductor Laser using passive alignment technique. The passive alignment method enables the ease and low cost of the packaging of Laser Diode-to-Fiber. For the fiber handling and alignment, the silicon etching technique and corner compensation method were employed to fabricate V-grooves and mechanical-stop structure, which make the fiber alignment easy. Also, the Lensed-Fiber was fabricated to increase the coupling efficiency and coupling tolerance of the fiber alignment.
The 70% coupling efficiency of the active alignment was achieved in the research using the passive alignment method and the Lensed-Fiber. For the single Mode Fiber packaging, 7.17% coupling efficiency was achieved without using any high precision Flip-Chip bonding equipment. Further, the 43.75% coupling efficiency was demonstrated for the Multi-Mode fiber. In comparison with the Active Alignment Method, only simply fixture and manual die bonding were employed in the passive alignment method to obtain a reasonably good coupling efficiency. Hence, this passive Alignment method using Lensed-Fiber demonstrates the low cost and easy alignment of semiconductor Laser packaging.
20
Hung, Sheng-Feng, and 洪聖峰. "Passive Alignment of Buried Optical Waveguide and Single Mode Fiber on the Silicon Bench." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/58316595127526408618.
Full textAbstract:
碩士<br>國立中山大學<br>光電工程研究所<br>93<br>The objective of this thesis is to integrate the optical waveguide and single mode fiber in a passive alignment way on a silicon bench. This technique can reduce the complexity of packaging the individual components and increase yield of the module in order to achieve the goal of the mass production. In this module, buried waveguide structure was used for light guidance. A 1.31µm semiconductor laser was used as the input light source. Light signal launched by semiconductor laser is transferred through the buried waveguide into the single mode fiber.
This module structure is consisted of two major parts, namely, the buried waveguide and the silicon bench. Buried optical Waveguide uses SO2 as the bottom cladding. Conventional photolithography procedures and etching technique were used to form a trench on the SiO2 cladding. The waveguide core was fabricated by coating the organic-inorganic hybrid materials into the trench. Finally, an organic-inorganic hybrid materials with a refractive index smaller than that of the core is used as the top cladding. The silicon benches were obtained by etching V-groove and saw-cutting U-groove on the silicon substrates for fixing the fiber. The patterning of buried waveguide and silicon V-groove were fabricated by a single optical mask procedure. Therefore accurate alignment between the waveguide and the single mode fiber can be obtained.
21
Chiu, Chih-hao, and 邱志豪. "A Study on Vision-Based and Multirate Control of an Optical Fiber Alignment Stage." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/78470686637001872651.
Full textAbstract:
碩士<br>國立成功大學<br>電機工程學系碩博士班<br>95<br>Due to the fact that the bandwidth of optic fiber transmission is several hundred times greater than cable transmission and optical communication technology is well-developed and has advanced in recent years, the optic fiber communication system has become the mainstream of wired communication. However, the coupling procedure between optic fiber and the waveguide is very complex so that the coupling loss caused by disalignment is inevitable. This creates an obstacle to cost reduction. Hence the technological demand of auto-assembly and positioning control cannot be overlooked.
The advantages of the Piezoelectric actuator (PEA) include high resolution, compactness, low energy consumption, and rapid response. This thesis takes advantages of PEA to develop a vision-based optical fiber alignment platform. However, the tracking control accuracy of PEA is limited due to its inherent hysteretic nonlinearity and time varying parameters. In order to cope with this difficulty, a feedforward inverse hysteresis controller based on a B-spline approximation model is adopted to eliminate the hysteresis effects. In addition, a fuzzy logic controller is designed to reduce the error due to noise and model uncertainty. The accuracy and robustness of the servo control scheme are verified via a variety of reference inputs.
In addition, the vision latency problem makes the visual command unsmooth and the performance is degraded. In order to improve the performance of the system with visual feedback, the idea of multirate control was exploited to shorten the sampling period of the control system. Experimental results show that the proposed approach exhibits satisfactory performance.
22
Lee, Chia-Yu, and 李佳祐. "Research of Transmitting Part for Compact and Passive-Alignment 4-channel × 2.5 Gbps Optical Interconnect Module." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/43273014418012351981.
Full textAbstract:
碩士<br>國立中央大學<br>光電科學研究所<br>97<br>In this thesis, an optical interconnect technology serving as a board to board interconnect is realized by assembling active and passive optical devices on a silicon-optical bench (SiOB). The transmitter module based on SiOB includes a monolithic integration of silicon-based 45°
micro-reflector, V-groove arrays, high-frequency transmission lines of 2.5 GHz, and bonding pads with Au/Sn eutectic solder, as well as hybrid integration of VCSEL and fiber ribbon with compatibility to high precise passive alignment process. The size of transmitter module can be only 1 × 1 cm2 for the 4-channel interconnect. The depth of 45° micro-reflector reaches to 110 μm for providing -6 dB coupling efficiency from Vertical-Cavity Surface-Emitting Laser (VCSEL) to multi-mode fiber (MMF). Utilizing micro lithography and flip chip bonding processes, the process tolerance and VCSEL bonding accuracy are within 6 % and 2 μm, respectively, making sure the optical alignment tolerance within 20 μm and only 1 dB power variation. The performance of transmission lines of 2.5 GHz is experimentally demonstrated. The eye pattern was measured at circuit source 6 mA for 2.5Gbps PN-signal (15 bit).
23
Chen, Pei-Chi, and 陳佩琪. "A Design of a Optical Fiber Network Fault Measurement Module Based on Coherent Detection." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/525spr.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>電子工程系<br>103<br>We present a method to measure the fault location in the optical fiber network based on the approach of coherent detection. The fault location monitoring of an optical fiber system can be achieved by measuring the interference signal that is formed by the reference signal and the test signal. In the set up, the Fabry-Perot Laser Diode is used as the light source to carry a frequency-sweep sinusoidal signal into the fiber-optic network. The signal can then be sent through the optical coupler divide the probe signal into the test signal and the reference signal. Using optical circulator to sent the reflect signal into the second optical coupler, where the two signal meet and interfere. Through the electro-optic effect of the photodetector the interfered optical signal is received and converted into an electrical signal that is time varying. By analyzing the signal intensity over time and converting it into the length of the optical fiber, the location of breakpoint or fusion point in the optical fiber network can be determined. The method we present has the advantages of simple architecture and low manufacturing cost. The features make it easier to produce and set up in the optical fiber communication system.
24
Lin, Chi-Chau, and 林啟超. "The Study on the Stress and Fatigue Life in Ferrule-Epoxy-Fiber Module of Optical Fiber Connector under Thermal Cycling." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/17859809882357740553.
Full textAbstract:
碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>91<br>The effects of different ferrule length and epoxy layer thickness of the module of optical fiber connector under thermal cycling are investigated in this thesis. The finite element method package, MSC. MARC, is used in this study and the coupled thermal-elastic-plastic model is employed in the analysis. The mechanical behavior and life prediction with different length of ferrule and thickness of epoxy layer are considered. It is shown that the thickness of epoxy layer has the major effect on the life of the module. The stress and strain in the fiber and epoxy layer are decreasing with increasing of ferrule length, and the life of the module is increasing with increasing of thickness of epoxy layer. Finally, we recommend the ferrule length can be designed between 7.89mm ~10.5mm.
25
Chen, Hsiu-Ping, and 陳秀萍. "Research of Receiving Part for Compact and Passive-Alignment 4-channel x 2.5 Gbps Optical Interconnect Module." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/94573383901553908969.
Full textAbstract:
碩士<br>國立中央大學<br>光電科學研究所<br>97<br>With the computing speed of computers up to several GHz and above, the telecommunications bandwidth through the traditional copper wire will be inadequate. Thus, incorporating optical light as a transmitting media will substantially improve most current interconnect technology due to its high transmission speed. Silicon optical bench technology for optical interconnect applications provides specific characteristics of miniaturized sizes, a good heat spreading, and so on. In addition, the fabrication process can be achieved by employing a standard semiconductor process technology. Therefore, it provides assembly with highly precise alignment, and mass-production possibilities.
In this thesis, the compact and passive-alignment 4-channel ? 2.5 Gbps optical interconnect receiving module includes a silicon-based 45-degree micro-reflector, V-groove arrays, high-frequency transmission lines of 4-channel ? 2.5 GHz, and bonding pads with Au-Sn eutectic solder. It’s a free-space optical interconnect technology serving as a board to board or chip-to-chip interconnect, which is realized by assembling active and passive optical devices on a silicon optical bench（SiOB）.
The compact and passive-alignment optical interconnect receiving module includes some important fabrication technology, ex: fabrication of SiOB、fabrication of high frequency transmission line、fabrication of bonding pads and fabrication of module assembly.
The transmission speed 2.5 Gbps / channel is achieved by the compact and passive-alignment optical interconnect receiving module and the size of SiOB can be only 5´5 mm2 for 4-channel interconnect. The optical performance simulated by the ray-tracing method, the coupling efficiency between multimode fiber and photo detector can reaches up to -2 dB. The cross-talk between neighboring channels can be suppressed down to -49 dB.
26
LIN, YU-CHENG, and 林育正. "Fabrication of High-Speed Optical Transceiver Module for SWDM-4 and Multi-Mode Fiber Transmissions." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ttv2j8.
Full textAbstract:
碩士<br>國立高雄應用科技大學<br>電子工程系<br>106<br>This thesis is divided into two parts, fabricating and measuring SWDM-4 optical transceiver module and 8-channel short wavelength PAM-4 optical receiver. At first, we measuring SWDM-4 optical transceiver module. We measure with NRZ modulation signal and the 850nm wavelength laser as the transmitter. In addition, we can use a fully integrated optical transceiver optimized for our module, and coupling by using a multi-mode fiber, and then complete the measurement. The measurement which is operated with 26Gb/s 231-1 Pseudo Random Binary Sequences (PRBS) signal. The eye diagram of optical transmitter signal: the SNR is 5.44, rising time is 16.54ps, falling time is 27.48ps, peak-to-peak jitter is 14.384ps, mask margin is 19.1%. At the receiver, the eye diagram of optical receiver signal: SNR is 6.16, rising time is 21.57ps, falling time is 22.26ps, peak-to-peak jitter is 17.42ps. We experimentally demonstrate error-free on 26Gb/s over 210m transmission. The second part, we designing, manufacturing and measuring 8-channel short wavelength PAM-4 optical receiver, the design of QSFP-DD optical receiver module was used, it have 8-channels and it can be applied in 400Gb/s receiving. The measurement which is operated with 26Gb/s NRZ modulation and 27-1 PRBS signal. At the receiver, the eye diagram of optical receiver signal: SNR is 5.11, rising time is 23.26ps, falling time is 21.71ps, peak-to-peak jitter is 12.834ps. Finally, the measurement which is operated with 25-Gbaud and 12.5-Gbaud PAM-4 modulation and 27-1 PRBS signal.
27
Park, Seung Ho. "Integration of a piezoelectric ultrasonic motor into a low temperature cofired ceramic package for active optical fiber alignment." 2007. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-2103/index.html.
Full text
28
Chen, Chian-Ya, and 陳千雅. "The Use of (R,s,S) Inventory Control Policy to Shorten Lead Time to Minimize the Total Cost of the Optimal Combination - The Case of Optical Fiber Module Manufacturing." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/71595796716736313994.
Full textAbstract:
碩士<br>元智大學<br>工業工程與管理學系<br>98<br>In today''s competitive market environment, information technology progress, how do firms maintain their competitive advantage is particularly important. In the past, generally in the inventory of relevant research, lead time is often one of the major factors we consider important. However, in many practical situations, in fact, lead time can use these methods to shorten the waiting time, especially in today''s business competitive era, time-efficient pursuit, shortening the lead time but the main factors essential for success, is also worth exploring and can study. In this study, optical fiber module manufacturing, for example, supply chain system of two classes of materials in order to shorten the lead time using (R,s,S) inventory control policy, by different periodic review inventory levels and to order, using the AutoMod simulation software can minimize the total cost to find the best combination.