Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"beam combining"”.
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BEAM COMBINING OF FIBER LASERS AND VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS USING VOLUME BRAGG GRATINGS
… laser sources with near diffraction limited beam quality outputs have enabled wide range of applications. However, physical constraints such as material heating and nonlinear effects limit the maximum achievable power of these laser sources. In order to obtain higher power level, beam …
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Surface -Etched Distributed Bragg Reflector Lasers in Photonic Integrated Circuits
… array is also presented for use in spectral beam combining systems. The laser structure for this application is engineered for high-power applications. The engineering of the lateral optical guiding structure as well as the surface-etched grating is discussed.
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Design, implementation and control of a sparse aperture imaging satellite
… of coherent wavefront sensing, control and combining as well as various systems engineering aspects to achieve cost effectiveness, are developed. To demonstrate a complete spacecraft in a 1-g environment, the ARGOS system is mounted on a frictionless air-bearing, and has the ability to track …
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Phase and Polarization Modulations based on LCOS SLM
… in tailoring ultrafast lasers writing beam for optical data storage. In data writing process, a light filed of target data pattern (multi-beam arrays) with target linear polarization state is required to encode information onto the nanograting structure created by laser pulses. In data …
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Development of an automated alignment system for the Magdalena Ridge Observatory Interferometer
… with baselines up to 347 metres. The optical beam trains will deliver light from the telescopes over hundreds of metres in vacuum pipes to a central beam combining laboratory that houses the fringe tracker and science instruments. One major improvement of the MROI over contemporary …
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Applications Of Linear And Nonlinear Optical Effects In Liquid Crystals
… One such application is the possibility of beam combining using Orientational Stimulated Scattering in a nematic liquid crystal cell. Our numerical study of the OSS process shows that normally this possibility does not exist. However, we found that if a number of special conditions is …
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Stellar interferometry - detectors and the atmosphere.
… stability measurements were made using WFTI for beam combining. The results show that it will acceptable for the beams returning from the individual array elements to the optics laboratory to propagate in free air, at least with short baselines. Finally, a new method for locating the COAST "white …
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High-power GaAs-based diode lasers with novel lateral designs for enhanced brightness, threshold and efficiency
… ηE, these applications also benefit from high beam quality, which is offered by BALs along the vertical (fast) axis but less so along the lateral (slow) axis, corresponding to relatively high lateral beam parameter product (BPPlat) and low lateral brightness (Blat = Popt / BPPlat). To enhance …