Academic literature on the topic 'Intensity modulation'

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Journal articles on the topic "Intensity modulation"

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Latychevskaia, Tatiana. "Wavefront Modulation and Beam Shaping into Arbitrary Three-Dimensional Intensity Distributions." Photonics 8, no. 6 (2021): 179. http://dx.doi.org/10.3390/photonics8060179.

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In this study the methods of three-dimensional (3D) wavefront intensity modulation by employing contrast-inverted holography, previously introduced as Gabor inverted holography, are further investigated. The present study provides the recipes for creating 3D wavefront intensity modulations using phase-only and amplitude-only modulators and compares the results. The 3D wavefront modulation using spherical waves is also demonstrated, and the miniaturization of 3D intensity beams is discussed; it is shown that both the resolution and the size of the created 3D structures are ultimately given by t
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Cangjie, Weng, Yang Dewei, Zheng Yuansheng, Zhao Yan, and Yao Tianlong. "Residual intensity modulation of Y-waveguide modulator." Journal of Applied Optics 38, no. 6 (2017): 602–6. http://dx.doi.org/10.5768/jao201738.0605002.

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Tavan, Mehrnaz, Erik Agrell, and Johnny Karout. "Bandlimited Intensity Modulation." IEEE Transactions on Communications 60, no. 11 (2012): 3429–39. http://dx.doi.org/10.1109/tcomm.2012.091712.110496.

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Hyun, Young-Jin, Jae-Young Choi, and Sang-Kook Han. "Dual Polarization Simultaneous Optical Intensity Modulation in Single Birefringent LiNbO3 Mach–Zehnder Optical Modulator." Photonics 9, no. 6 (2022): 386. http://dx.doi.org/10.3390/photonics9060386.

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A new method of simultaneous modulation of dual-polarization intensity based on a single LiNbO3 Mach–Zehnder modulator (MZM) is proposed. Using the birefringence of lithium niobate, the bipolar optical intensity can be modulated independently with the proposed modulation condition. In this paper, the optimized modulation conditions and the performance of the proposed method are investigated through simulations and experiments.
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Dye, S. P., and N. J. Gomes. "Dual-modulation compensation for optical intensity modulator nonlinearities." IEEE Photonics Technology Letters 8, no. 1 (1996): 72–74. http://dx.doi.org/10.1109/68.475782.

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Bleuel, M., E. Lang, R. Gähler, and J. Lal. "CIM—Compact intensity modulation." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 592, no. 3 (2008): 400–404. http://dx.doi.org/10.1016/j.nima.2008.04.039.

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Lu, Cunwei, Akasi Yamaguchi, and Seiji Inokuchi. "Intensity modulation moiré topography." Optics & Laser Technology 29, no. 2 (1997): xii. http://dx.doi.org/10.1016/s0030-3992(97)88437-x.

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Urbanek, Jacek, Jerome Antoni, and Tomasz Barszcz. "Detection of signal component modulations using modulation intensity distribution." Mechanical Systems and Signal Processing 28 (April 2012): 399–413. http://dx.doi.org/10.1016/j.ymssp.2011.12.018.

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Liu, Xudong, Hao Chen, Teng Li, and Yiwen Sun. "Low-voltage driven graphene-loaded metal wire grating device in total internal reflection geometry for broadband THz modulation." Terahertz Science and Technology 14, no. 2 (2021): 44–51. http://dx.doi.org/10.1051/tst/2021142044.

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Terahertz modulators with capability of both intensity and phase are essential for THz imaging and communication systems. The low-voltage driven THz modulation technique is crucial for integrating the modulators with electronics components. There is still a lack of broadband devices able to achieve both amplitude and phase modulation with low voltage, due to the underlying physics behind existing approaches. Here, we demonstrate a graphene-loaded metal wire grating THz modulator in the total internal reflection geometry to achieve intensity modulation of 80% and phase modulation of 70 degree w
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Zhou, Shiyi, Zhijun Zhang, Chuliang Zhou, Zhongpeng Li, Ye Tian, and Jiansheng Liu. "A high-energy electron density modulator driven by an intense laser standing wave." Laser and Particle Beams 37, no. 2 (2019): 197–202. http://dx.doi.org/10.1017/s0263034619000338.

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AbstractA high energy electron density modulator from a high-intensity laser standing wave field is studied herein by investigating the ultrafast motion of electrons in the field. Electrons converge at the electric field antinodes, and the discrete electron density peaks modulated by the field located at the corresponding laser phases of kx = nπ, (n = 0, 1, 2, …), that is, the modulation period is 1/2 the wavelength of the individual laser. We also discussed the influence of the laser parameters such as laser intensity and waist size on the beam modulator. It is shown that a long interaction l
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Dissertations / Theses on the topic "Intensity modulation"

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DAGLIO, STEFANO CARLO. "GFP photo switchable mutants for intensity modulation." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2012. http://hdl.handle.net/10281/31053.

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Photo-switchable chromophores are fluorescent inorganic dyes or proteins characterized by the tunability of their emission depending on the properties of the exciting radiation such as wavelength or intensity. The opportunities o ered by this kind of markers in the field of fluorescence microscopy, range from super-resolution imaging to molecular intracellular sensing of pH, calcium or second messengers. In this thesis I have studied the properties of two photo switchable GFP Mut2 mutants (E222Q and Mut2GQ) and their possible applications to biological fluorescence pump and probe imaging.
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Remley, Jon Stephen. "The Preferred Oboe Vibrato: An Analysis of Pitch Modulation and Intensity Level Modulation." Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc278116/.

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The purpose of this study was to determine the pitch and intensity level characteristics found in the vibrati of preferred oboe players whose vibrato was ranked by a panel of experts. The investigation also sought to discover factors that distinguish the preferred oboe vibrato from vibrato that is less preferred.
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Constans, Charlotte. "Modulation of brain activity with low intensity focused ultrasound." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC006/document.

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Devant l'impact des maladies neurodégénératives sur la société, les thérapies par ultrasons focalisés apparaissent comme des techniques prometteuses combinant non invasivité, précision spatiale millimétrique et capacité d'atteindre les structures profondes du cerveau. Cependant, des travaux sont encore nécessaires pour renforcer les effets de la neuromodulation, comprendre les mécanismes sous-jacents et contrôler la sûreté de la technique avant d'entreprendre des essais cliniques. Dans cette thèse, la propagation des ultrasons dans le cerveau de rongeurs et de singes a été étudiée numériquemen
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Sathian, Juna. "Investigation of the intensity dependence of amplitude noise in electro-optic phase modulators." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/63003/1/Juna_Sathian_Thesis.pdf.

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This thesis studied the source of instability in optical phase modulators used in high accuracy laser measurement systems. The nonlinear origin of the amplitude noise helped further reducing this instability in applications that rely on phase modulators to function. This outcome will have positive impacts on the development of new methods in the amplitude noise suppression.
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Obata, Yasunori, and Hiroshi Oguchi. "Commissioning of modulator-based IMRT with XiO treatment planning system." AIP Publishing, 2009. http://hdl.handle.net/2237/20613.

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Jason, Johan. "Fibre-Optic Displacement and Temperature Sensing Using Coupling Based Intensity Modulation and Polarisation Modulation Techniques." Doctoral thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-18964.

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Optical fibre sensors are employed in the measurements of a number of different physical properties or for event detection in safety and security systems. In those environments which suffer from electromagnetic disturbance, in harsh environments where electronics cannot survive and in applications in favour of distributed detection, fibre-optic sensors have found natural areas of use. In some cases they have replaced conventional electronic sensors due to better performance and long-term reliability, but in others they have had less success mainly due to the higher costs which are often involv
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Hansen, Mark W. "High intensity phase modulation using absorption saturated multiple quantum wells /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9914073.

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Dimitrov, Svilen Dimitrov. "Analysis of OFDM-based intensity modulation techniques for optical wireless communications." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7833.

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Optical wireless communication (OWC) is a promising alternative to radio frequency (RF) communication with a significantly larger and unregulated spectrum. Impairments in the physical layer, such as the non-linear transfer characteristic of the transmitter, the dispersive optical wireless channel and the additive white Gaussian noise (AWGN) at the receiver, reduce the capacity of the OWC system. Single-carrier multi-level pulse position modulation (M-PPM) and multilevel pulse amplitude modulation (M-PAM) suffer from inter-symbol interference (ISI) in the dispersive channel which reduces their
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Meyer, Jurgen. "Accommodating practical constraints for intensity-modulated radiation therapy by means of compensators." Thesis, Coventry University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369972.

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Kim, Ryoung-Han. "Design and fabrication of highly efficient electrooptic modulators using bragg grating reflectors." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/3325.

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Bragg grating reflectors etched in amorphous silicon overlay films have been integrated with Ti:LiNbO3 optical waveguides. With a 12.5 mm long grating segment and an etch depth of ~ 93 nm in a 105 nm-thick silicon film, a narrow (0.05 nm) spectral bandwidth with a record high transmission dip (> 20 dB) was achieved at a wavelength of ~1542 nm for TE polarization on an x-cut, y-propagating substrate. The reflectance in the channel waveguides is found to be strongly dependent on the depth of the etched grating. The 3-dB bandwidth of 0.05 nm obtained for all tested samples is the smallest reporte
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Books on the topic "Intensity modulation"

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Whissell, Paul. Open field behaviour in rats following postnatal nitric oxide modulation and exposure to extremely low frequency, low intensity (5nT) magnetic fields. Laurentian University, 2005.

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Korol, Renée. Intensity-modulated radiation therapy with Cobalt beams and modulating filters. Laurentian University, School of Graduate Studies, 2003.

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McManus, Alison M., and Neil Armstrong. Pulmonary function. Edited by Neil Armstrong and Willem van Mechelen. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780198757672.003.0010.

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The principles of pulmonary ventilation are the same for children and adults. Ventilation adjusts to alterations in metabolic demand in the child; but for a given exercise intensity there is a greater ventilation when expressed relative to body mass and a higher energetic cost of breathing in the child compared to the adult. Limited evidence suggests child-adult differences may be a result of immature chemoreception, a greater drive to breathe, differences in airway dimensions, and the mechanical work of breathing. There are few studies investigating the dynamic ventilatory response to moderat
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Mulligan, Jeffrey B. Illusory Variations in Apparent Dot Brightness Induced by Density Modulations. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199794607.003.0056.

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When small, closely spaced dots are moved closer together, they appear brighter. The effect is observed for dot spacings of half a degree of visual angle or less and can be cancelled either by dimming the dots themselves or adding a compensating modulation to the background. The effects are easily observed and challenge current models of brightness perception. This illusion demonstrates that we are unable to judge the brightness of a small dot independently of the total amount of light falling in its local neighborhood. All of the dots are rendered with the same intensity, but the dots appear
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Tenney, James. On the Physical Correlates of Timbre. Edited by Larry Polansky, Lauren Pratt, Robert Wannamaker, and Michael Winter. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252038723.003.0004.

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James Tenney discusses the physical correlates of timbre using the digital computer technique developed at the Bell Telephone Laboratories. His intention is to synthesize a large class of timbres, first by considering the physical properties of natural sounds as well as sounds produced by conventional musical instruments. He goes on to explore how many different ways that the quality or timbre of a sound may be made to vary perceptibly, and in how many ways the quality of one sound may be distinguished from that of another, given that the perceived pitch, intensity, and duration are held const
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Wijdicks, Eelco F. M., and Sarah L. Clark. Immunosuppression and Immunotherapy. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190684747.003.0010.

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Immune modulation in the neurosciences intensive care unit mostly involves high-dose corticosteroids, plasma exchange, and immunoglobulin. Corticosteroids are frequently used in patients with neurologic complications of cancer. Neurosurgeons typically use corticosteroids after performing a craniectomy to reduce cerebral edema. Corticosteroids are the established initial treatment modality of choice for patients with acute metastatic epidural spinal cord compression. Therapeutic apheresis or immunoglobulin is generally used as supportive therapy in patients with Guillain-Barré syndrome, myasthe
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Brondolo, Elizabeth, Irene V. Blair, and Amandeep Kaur. Biopsychosocial Mechanisms Linking Discrimination to Health: A Focus on Social Cognition. Edited by Brenda Major, John F. Dovidio, and Bruce G. Link. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780190243470.013.8.

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This chapter presents a theoretical framework that highlights the role of social cognition in mediating the effects of discrimination on health. This framework suggests that through alterations in schemas and appraisal processes, long-term discrimination increases the experienced frequency, intensity, and duration of threat exposure and concomitant distress. At the same time, the ability to recover from threat exposure may be impaired by the effects of discrimination on cognitive control processes that are necessary for modulating stress responses. Together, these processes may influence the a
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Tyndall, Alan, and Jacob M. van Laar. Stem cell therapies. Oxford University Press, 2013. http://dx.doi.org/10.1093/med/9780199642489.003.0085.

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Since the start of the international project in 1997, over 1500 patients have received a haematopoietic stem cell transplant (HSCT), mostly autologous, as treatment for a severe autoimmune disease, with overall 85% 5-year survival and 43% progression-free survival. Around 30% of patients in all disease subgroups had a complete response, often durable despite full immune reconstitution. In many cases, e.g. systemic sclerosis, morphological improvement such as reduction of skin collagen and normalization of microvasculature was documented, beyond any predicted known effects of intense immunosupp
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Tyndall, Alan, and Jacob M. van Laar. Stem cell therapies. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199642489.003.0085_update_003.

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Since the start of the international project in 1997, over 2000 patients have received a haematopoietic stem cell transplant (HSCT), mostly autologous, as treatment for a severe autoimmune disease, with overall 85% 5-year survival and 43% progression-free survival. Around 30% of patients in all disease subgroups had a complete response, often durable despite full immune reconstitution. In many cases, e.g. systemic sclerosis, morphological improvement such as reduction of skin collagen and normalization of microvasculature was documented, beyond any predicted known effects of intense immunosupp
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Book chapters on the topic "Intensity modulation"

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Weik, Martin H. "intensity modulation." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_9275.

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Weik, Martin H. "amplitude intensity modulation." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_601.

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Weik, Martin H. "analog intensity modulation." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_628.

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Petermann, K. "Intensity-Modulation Characteristics of Laser Diodes." In Laser Diode Modulation and Noise. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2907-4_4.

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Xiao, Ying, Jay E. Reiff, Timothy Holmes, et al. "Intensity Modulated Radiation Therapy: Beam Modulation." In Encyclopedia of Radiation Oncology. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-540-85516-3_267.

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Arigoni, Anio O. "Modulation of the intensity of formalized attributes." In Uncertainty and Intelligent Systems. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/3-540-19402-9_85.

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Maas, Jan, Martin Rumpf, and Stefan Simon. "Transport Based Image Morphing with Intensity Modulation." In Lecture Notes in Computer Science. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58771-4_45.

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Yu, Jianjun, and Nan Chi. "Intensity Modulation Direct Detection High-Speed Fiber Access System." In Digital Signal Processing In High-Speed Optical Fiber Communication Principle and Application. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3098-2_14.

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Das, Srijan, Saurav Sharma, Sambit Bakshi, and Imon Mukherjee. "A Framework for Pixel Intensity Modulation Based Image Steganography." In Advances in Intelligent Systems and Computing. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6872-0_1.

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De Neve, W., F. Claus, W. Duthoy, G. De Meerleer, and C. De Wagter. "Intensity Modulation Techniques for Improvement of Normal Tissue Tolerance." In Frontiers of Radiation Therapy and Oncology. KARGER, 2001. http://dx.doi.org/10.1159/000061317.

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Conference papers on the topic "Intensity modulation"

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Su, Xinzhou, Chun-ho Lee, Xinyi Ren, et al. "Demonstration of Mid-Wavelength Infrared IM/DD Communications Using Air-suspended Thin-Film Lithium Niobate Intensity Modulator." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.th3j.1.

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We demonstrate an air-suspended thin-film-lithium-niobate Mach-Zehnder intensity modulator for mid-infrared communications. Data channels of various modulation formats are achieved, including 1.5-Gbaud OOK, 1.5-Gbaud PAM-4, 0.5-Gbaud PAM-6, and 0.5-Gbaud PAM-8.
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Ning, Xiaohui. "Broadband light-intensity modulator." In OSA Annual Meeting. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.wb7.

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Broadband light intensity modulators are useful in a number of applications. It has been reported that by making a multilayer stack having a random thickness/index distribution an excellent broadband reflector is obtained.1 If dynamic materials, i.e, electro-optic, nonlinear-optic materials are used to construct the device, a broadband light modulator is obtained. The light modulation is achieved by varying the applied external field if electro-optic materials are used. If nonlinear-optic material is used the device is self-modulating. The configuration chosen for analysis consists of alternat
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Soda, H., K. Nakai, H. Ishikawa, and H. Imai. "High-speed and low-chirp GaInAsP/InP optical intensity modulator." In Integrated and Guided Wave Optics. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/igwo.1988.mb2.

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High-speed and low-chirp external optical intensity modulators are important for future high-bit rate transmission systems, because in direct modulation of a laser diode the transmission bandwidth is limited by the large chirp during relaxation oscillation. A GaInAsP/InP optical intensity modulator [1], [2] is one of the candidates for such an external modulator. However it has been recently pointed out that some chirp is caused in such an electroabsorption modulator by the accompanied phase modulation [3]. Until now the dynamic spectral broadening factor αE which characterizes chirp was obtai
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de Valicourt, G., M. A. Mestre, J. C. Antona, et al. "Integrated non-quadrature intensity modulation transmitter based on prefixed optical phases and intensity modulations." In 2014 European Conference on Optical Communication (ECOC). IEEE, 2014. http://dx.doi.org/10.1109/ecoc.2014.6963908.

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Antona, J. C., P. Layec, and G. De Valicourt. "Non quadrature intensity modulation formats." In 2014 European Conference on Optical Communication (ECOC). IEEE, 2014. http://dx.doi.org/10.1109/ecoc.2014.6964103.

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Deng, Hong, and Wim Bogaerts. "Configurable Modulator based Optical Carrier Frequency Suppressed Intensity Modulation." In 2022 IEEE Photonics Society Summer Topicals Meeting Series (SUM). IEEE, 2022. http://dx.doi.org/10.1109/sum53465.2022.9858295.

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Wang, Z., and A. P. Knights. "Dual-ring-assisted MZI silicon modulator for enhanced intensity modulation." In 2016 IEEE 13th International Conference on Group IV Photonics (GFP). IEEE, 2016. http://dx.doi.org/10.1109/group4.2016.7739052.

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Shen, Weimin, and Xujie Huang. "Athermalized polarimetric-spectral intensity modulation technology." In Fifth Symposium on Novel Optoelectronic Detection Technology and Application, edited by Qifeng Yu, Wei Huang, and You He. SPIE, 2019. http://dx.doi.org/10.1117/12.2517177.

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Feit, Michael D., and Alexander M. Rubenchik. "Laser intensity modulation by nonabsorbing defects." In Second International Conference on Solid State Lasers for Application to ICF, edited by Michel L. Andre. SPIE, 1997. http://dx.doi.org/10.1117/12.294285.

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Nicolas, Josep, and Gastón García. "Modulation of intensity in defocused beams." In SPIE Optical Engineering + Applications, edited by Ali Khounsary, Shunji Goto, and Christian Morawe. SPIE, 2013. http://dx.doi.org/10.1117/12.2024528.

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Reports on the topic "Intensity modulation"

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Mackenzie, G. H., W. R. Rawnsley, and R. Lee. A demonstration of beam intensity modulation without loss of charge. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/132750.

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Liu, Wu. Development of Novel Treatment Plan Verification Techniques for Prostate Intensity Modulation Arc Therapy. Defense Technical Information Center, 2010. http://dx.doi.org/10.21236/ada526611.

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Wilson, D., Chris Pettit, Vladimir Ostashev, and Matthew Kamrath. Signal power distributions for simulated outdoor sound propagation in varying refractive conditions. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48774.

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Probability distributions of acoustic signals propagating through the near-ground atmosphere are simulated by the parabolic equation method. The simulations involve propagation at four angles relative to the mean wind, with frequencies of 100, 200, 400, and 800 Hz. The environmental representation includes realistic atmospheric refractive profiles, turbulence, and ground interactions; cases are considered with and without parametric uncertainties in the wind velocity and surface heat flux. The simulated signals are found to span a broad range of scintillation indices, from near zero to exceedi
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