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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.8
- 수록면
- 346 - 350 (5page)
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초록· 키워드
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We report a measurement of the effective refractive index of a nematic liquid crystal (NLC) insidea Fabry-Perot (FP) etalon according to the applied electric fields. The effective refractive index of theNLC depends on the intensity of the applied electric field. A wavelength-swept laser with apolygon-scanner-based wavelength filter is used as a wide-band optical source to measure the effectiverefractive index of the NLC. The bandwidth of the optical source is greater than 90 nm around 1300nm. The fabricated NLC FP etalon consists of glass substrates, gold layers as the electrodes with highlyreflective surfaces, polyimide layers as the planar alignment layers, and an LC layer. Furthermore, wemeasured the Freedericksz transition voltages for three types of NLC FP etalons having thicknesses of30.6 μm, 55.4 μm, and 108.8 μm. The Freedericksz transition voltages in the three cases are nearly equal.
The measured effective refractive indices in the three cases decreased from 1.67 to 1.51 as the appliedelectric field intensity was increased. Beyond the threshold electric field, the effective refractive indicesquickly decreased and eventually saturated at a value of 1.51 for all cases
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참고문헌 (15)
참고문헌 신청
M. Tabib-Azar / 2000 / Fiber optic electric field sensors using polymerdispersed liquid crystal coatings and evanescent field interactions / Sens. Actuators A 84:134~139
S. Mathews / 2011 / Liquid crystal infiltrated photonic crystal fibers for electric field intensity measurements / Appl. Opt 50:2628~2635
M. O. Ko / 2014 / Dynamic measurement for electric field sensor based on wavelength-swept laser / Opt. Express 22:16139~16147
T. T. Larsen / 2003 / Optical devices based on liquid crystal photonic bandgap fibres / Opt. Express 11:2589~2596
L. R. Jaroszewicz / 2006 / Tunable liquid crystal fiber-optic polarizer and related elements / Molecular Crystals and Liquid Crystals Science and Technology, Section A. Molecular Crystals and Liquid Crystals 368:17~24
S. Mathews / 2011 / Liquid crystal infiltrated photonic crystal fibers for electric field intensity measurements / Appl. Opt 50:2628~2635
M. O. Ko / 2014 / Dynamic measurement for electric field sensor based on wavelength-swept laser / Opt. Express 22:16139~16147
T. T. Larsen / 2003 / Optical devices based on liquid crystal photonic bandgap fibres / Opt. Express 11:2589~2596
L. R. Jaroszewicz / 2006 / Tunable liquid crystal fiber-optic polarizer and related elements / Molecular Crystals and Liquid Crystals Science and Technology, Section A. Molecular Crystals and Liquid Crystals 368:17~24
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