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 7 of 7 for “"Waveplate"”.
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Voltage programmable liquid optical devices
… device. The first is a rotatable liquid crystal waveplate and the second is an amplitude programmable liquid phase grating. The rotatable waveplate was created by confining a droplet of E7 nematic liquid crystal between two glass substrates in a photolithographically produced square well of …
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Plasmonic devices based on transparent conducting oxides for near infrared applications
… such as plasmonic resonator for bio-sensing and waveplate metasurfaces. In addition, we study the impact of TCOs to local antenna as epsilon-near-zero (ENZ) substrate. The technological importance of the IR range is apparent and growing, and as plasmonics develops a niche at these frequencies, I …
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Terahertz Time Domain Spectroscopy of Anisotropic Systems: techniques, analysis and applications
… method for designing and constructing achromatic waveplates is discussed. Using this method, a proof of concept waveplate is fabricated and shown to induce an ellipticity of at least 0.75 over the THz bandwidth of 0.75 to 2.25 THz. Discussion then shifts to the field of gas spectroscopy using …
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Development of a High Repetition Rate, Electro-optically Q-switched Ho:YAG Laser
… the addition of an RTP Pockels cell, a quarter-waveplate, and a Brewster’s angled ZnSe window. The system was able to operate over a range of repetition rates between 8 and 11 kHz, and up to an average output power of 12.75 W at a slope efficiency of ~42.5%. The inclusion of the Q-switching …
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Nonlinear Light - Matter Interactions of Ultrafast High Intensity Laser Pulses
… intensities, the material will act similar to a waveplate and can create multiple phase rotations in a probing beam. This effect can be studied by looking at the oscillatory structure it forms in a Kerr Gate. The oscillatory structure reported here has never been reported in CS<sub>2 </sub>and is …
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High-power fibre lasers
… a simple set of optic elements such as a l/2 waveplate, a polarizing beam-splitter and a bulk grating, we investigated the polarization characteristics of an Yb3+ fibre laser, from which we obtained 6.5 W of single polarization tunable output in the range of 1070 to 1106 nm. As a free running …
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Design and application of near infrared tunable filter for ATST and NST
… Solar Telescope (NST), the design of achromatic waveplates, the narrowband continuum observation of a Sunspot at 1.56 um using IRIM instruments, and the coronal hole observation using the Digital Vector Magnetograph (VMG) at Big Bear Solar Observatory (BBSO). A near infrared tunable filter system …