Log in

Relevant bibliographies by topics / Broad area laser / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Broad area laser.

Dissertations / Theses on the topic 'Broad area laser'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 20 dissertations / theses for your research on the topic 'Broad area laser.'

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

Gawali, Sandeep Babu. "Intracavity spatial filtering in broad area semiconductor laser." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/670567.

Full text

Abstract:

Semiconductor lasers in high-power regime typically manifest a poor beam quality due to its asymmetric beam divergence and its large beam quality factor (M2). The emission along one of the transverse directions (slow axis) is typically multimode while being single mode in the perpendicular direction (fast axis). Due to the multimode emission and the absence of any intrinsic mode selection mechanism, the beam quality of broad area semiconductor (BAS) laser is degraded. In this work, we demonstrate that, by means of spatial filtering technique, the beam quality may be improved along the lateral

APA, Harvard, Vancouver, ISO, and other styles

2

Coons, Ryan William. "Narrow-bandwidth operation and improved beam quality of a semiconductor broad area laser in an improved variable-length external cavity." Oxford, Ohio : Miami University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1164689166.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Sands, Brian L. "Characteristics and dynamics of a passively stabilized high power and narrow-bandwidth broad-area laser coupled to an external variable length cavity." Connect to this document online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1122662023.

Full text

Abstract:

Thesis (M.S.)--Miami University, Dept. of Physics, 2005.<br>Title from first page of PDF document. Document formatted into pages; contains [1], ix, 93 p. : ill. Includes bibliographical references (p. 88-93).

APA, Harvard, Vancouver, ISO, and other styles

4

Srinivasan, Pradeep. "DESIGN AND FABRICATION OF SPACE VARIANT MICRO OPTICAL ELEMENTS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2817.

Full text

Abstract:

A wide range of applications currently utilize conventional optical elements to individually transform the phase, polarization, and spectral transmission/reflection of the incident radiation to realize the desired system level function. The material properties and the feasibility of fabrication primarily impact the device and system functionality that can be realized. With the advancement in micro/nano patterning, growth, deposition and etching technology, devices with novel and multiplexed optical functionalities have become feasible. As a result, it has become possible to engineer the device

APA, Harvard, Vancouver, ISO, and other styles

5

Zeghuzi, Anissa. "Analysis of Spatio-Temporal Phenomena in High-Brightness Diode Lasers using Numerical Simulations." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/22016.

Full text

Abstract:

Breitstreifenlaser haben eine breite Emissionsapertur, die es ermöglicht eine hohe Ausgangsleistung zu erreichen. Gleichzeitig führt sie jedoch zu einer Verringerung der lateralen Strahlqualität und zu ihrem nicht-stationären Verhalten. Forschung in diesem Gebiet ist anwendungsgetrieben und somit ist das Hauptziel eine Erhöhung der Brillanz, die sowohl die Ausgangsleistung als auch die laterale Strahlqualität beinhaltet. Um die zugrunde liegenden raumzeitlichen Phänomene zu verstehen und dieses Wissen zu nutzen, um die Kosten der Brillanz-Optimierung zu minimieren, ist ein selbst-konsistentes

APA, Harvard, Vancouver, ISO, and other styles

6

O'Daniel, Jason. "INTEGRATED WAVELENGTH STABILIZATION OF BROAD AREA SEMICONDUCTOR LASERS USING A DUAL GRATING REFLECTOR." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3290.

Full text

Abstract:

A new fully integrated wavelength stabilization scheme based on grating-coupled surface-emitting lasers is explored. This wavelength stabilization scheme relies on two gratings. The first grating is fabricated on the p-side of the semiconductor laser in close proximity to the laser waveguide such that it couples light out of the guided mode of the waveguide into a propagating mode in the substrate; this grating is known as the grating coupler. The second grating is fabricated on the n-side of the substrate such that for the stabilization wavelength, this second grating operates in the Littrow

APA, Harvard, Vancouver, ISO, and other styles

7

Kim, Shin-Sung. "Control of lateral modes of semiconductor broad area lasers for improving far-field characteristics." Thesis, University of Glasgow, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425121.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Bawamia, Ahmad Ibrahim [Verfasser], and Günther [Akademischer Betreuer] Tränkle. "Improvement of the beam quality of high-power broad area semiconductor diode lasers by means of an external resonator / Ahmad Ibrahim Bawamia. Betreuer: Günther Tränkle." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2011. http://d-nb.info/1017593663/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Frevert, Carlo [Verfasser], Günther [Akademischer Betreuer] Tränkle, Günther [Gutachter] Tränkle, Stephen [Gutachter] Sweeney, and Michael [Gutachter] Kneissl. "Optimization of broad-area GaAs diode lasers for high powers and high efficiencies in the temperature range 200-220 K / Carlo Frevert ; Gutachter: Günther Tränkle, Stephen Sweeney, Michael Kneissl ; Betreuer: Günther Tränkle." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1174990643/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Chang, Shu-Cheng, and 張書政. "High power 0.85um broad area laser fabrication by proton implantation." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/02808646972993992356.

Full text

Abstract:

碩士<br>國立交通大學<br>光電工程研究所<br>84<br>In this thesis, we report the fabrication of broad area high power 0.85 um single quantum well AlGaAs/GaAs graded index separate confinement (GRINSCH SQW) lasers by proton implantation and molecular beam epitaxy techniques.Lasers withand without anti-reflection and high-reflection coating on the two facets arecompared. Low threshold current density of 230 A/cm2 and threshold current of230 A are obtained for a 100 um wide and 1 mm long cavity. At 2.5 A inject

APA, Harvard, Vancouver, ISO, and other styles

11

Kou, Ren-Jay, and 寇人傑. "Transverse Mode in Broad-Area Oxide-Confined Vertical-Cavity Surface-Emitting Laser." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/35528182223231223918.

Full text

Abstract:

博士<br>國立交通大學<br>光電工程所<br>91<br>We present experimental studies on the transverse modal behaviour of oxide-confined Vertical-Cavity Surface-Emitting Laser (VCSEL). The near- and far-field transverse mode patterns are investigated under CW pumping condition. The VCSEL with 20 μm diameter of the oxide apertures exhibits the complex flower-like and y-junction structured patterns in far-field images. A comparison between a 20 μm diameter aperture oxide-confined VCSEL and a proton-implanted VCSEL enables us to clearly distinguish the influence of different guiding mechanisms on the transverse modal

APA, Harvard, Vancouver, ISO, and other styles

12

Lan, Yu-Pin, and 藍宇彬. "Frequency stabilization of single and dual-wavelength broad-area semiconductor laser diode in an external cavity." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/84515996332164800833.

Full text

Abstract:

碩士<br>國立交通大學<br>光電工程研究所<br>84<br>The primary focus of this thesis is the investigation of the output linewidth and the feasibility of the frequency stabilization of a tunable broad- area laser diode in an external cavity . The external cavity consists of a grazing- incidence grating , lens , and strip-mirror . By using a V-shape strip mirror , the laser could be operated in a dual- wavelength mode . Frequency stabilization of the laser output is achieved by fee

APA, Harvard, Vancouver, ISO, and other styles

13

Sincore, Alex. "Broad Bandwidth, All-fiber, Thulium-doped Photonic Crystal Fiber Amplifier for Potential Use in Scaling Ultrashort Pulse Peak Powers." Master's thesis, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6186.

Full text

Abstract:

Fiber based ultrashort pulse laser sources are desirable for many applications; however generating high peak powers in fiber lasers is primarily limited by the onset of nonlinear effects such as self-phase modulation, stimulated Raman scattering, and self-focusing. Increasing the fiber core diameter mitigates the onset of these nonlinear effects, but also allows unwanted higher-order transverse spatial modes to propagate. Both large core diameters and single-mode propagation can be simultaneously attained using photonic crystal fibers. Thulium-doped fiber lasers are attractive for high peak po

APA, Harvard, Vancouver, ISO, and other styles

14

Tsai, Chih-Hung. "High-power angled broad-area semiconductor lasers." 2004. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-0607200412193300.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Tsai, Chih-Hung, and 蔡志宏. "High-power angled broad-area semiconductor lasers." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/96500476349884088643.

Full text

Abstract:

碩士<br>國立臺灣大學<br>物理研究所<br>92<br>High power and good beam quality are desired for semiconductor lasers in many applications such as spectroscopy, device and material characterization, laser and amplifier pumping, and nonlinear wavelength conversion. We propose a new type of broad area laser diodes that is capable of emitting good beam quality, high power and broadband tuning. The new type of laser diodes is fabricated with a broad-area waveguide that is oriented at an angle from the facet normal. This device does not require the DFB structure, so the fabrication is much simpler. The L-I curves

APA, Harvard, Vancouver, ISO, and other styles

16

Lei, Chi-Fong, and 李子峰. "Study of Beam Filamentation in Broad Area Lasers." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/11854159791006905490.

Full text

Abstract:

碩士<br>國立交通大學<br>電子工程學系<br>85<br>Filamentation commonly occurs in broad area semiconductor laser due to two intinsic mechanisms: carrier-induced index change and intensity-induced index change. In this thesis, we investigate the effects of thesetwo mechanisms to the formation of filaments in semiconductor lasers theoretically. The theoretical model is derived thoroughly and two numericalmethods are used to calculate it, and they are 2-D Beam Propagation Method and 1-D Nonlinear Eigen-Equatio

APA, Harvard, Vancouver, ISO, and other styles

17

Schulz-Ruhtenberg, Malte [Verfasser]. "Experimental analysis of spatial states in broad area vertical cavity surface-emitting lasers / vorgelegt von Malte Arved Schulz-Ruhtenberg." 2008. http://d-nb.info/990151913/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Yu, Yan-Ting, and 余彥廷. "Investigation of Spontaneous Emission and Spatial-Temporal Dynamics in Broad-Area Vertical-Cavity Surface Emitting Lasers: Manifestation of Quantum Chaos." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/31243221080945925102.

Full text

Abstract:

博士<br>國立交通大學<br>電子物理系所<br>100<br>Basic properties as well as applications in physics research of broad-area VCSELs from below to far above threshold are thoroughly investigated. Firstly, the high-resolution measurement demonstrates that over a thousand cavity modes with a narrow linewidth can be perfectly exhibited in the subthreshold emission spectra. Further analyses of the obtained spectra confirm that the subthreshold emission spectra of broad-area VCSELs can be exploited to analogously investigate the energy spectra of the 2D quantum billiards. In addition, due the analogy between Helmhol

APA, Harvard, Vancouver, ISO, and other styles

19

Chen, Chien-Cheng, and 陳建誠. "Analogous Investigations on the Transverse Modes of Broad-Area Vertical-Cavity Surface-Emitting Lasers by Mesoscopic Wave Functions of Quantum Billiards." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/11662901106411763560.

Full text

Abstract:

博士<br>國立交通大學<br>電子物理系所<br>97<br>The analogies between paraxial optics and two-dimensional (2-D) quantum mechanics lie in the heart of this thesis. Based on the similarity between Helmholtz equation and time-independent Schrödinger equation, mesoscopic wave functions of quantum billiards are used to interpret the high-order transverse modes of broad-area Vertical-Cavity Surface-Emitting Lasers (VCSELs). Reversely, chaotic-shaped VCSELs can be employed to analogously observe the wave functions of non-integrable billiards which have no analytic solutions. In addition, the free-time evolution o

APA, Harvard, Vancouver, ISO, and other styles

20

Chen, Teng-Chi, and 陳騰麒. "Simulation and optimization of near and far field beam profiles of broad area semiconductor lasers using the FFT-BPM and genetic algorithm." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/17809439005531506933.

Full text

Abstract:

碩士<br>國立成功大學<br>微電子工程研究所碩博士班<br>96<br>In the thesis, the performances and characteristics of broad area semiconductor lasers were simulated using the carrier distribution equation and the FFT-BPM method. The physics mechanisms such as hole burning resulting from the interaction between carriers and electromagnetic field, and self-focusing caused by the nonlinear Kerr effect were taken into account in simulation. A broad-area semiconductor laser has a broad area of pump stripe for current injection that contributes high output power but also gives rise to bad beam profiles in near and far field

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!