When a linearly polarized light is launched into a birefringent material, the output light is generally elliptically polarized. The ratio of the major and minor axes of the polarization ellipse varies depending on the angle between the polarization direction of the input light and the birefringent axis of the medium. The maximum ratio is determined only by the retardation due to the birefringence. Utilizing this phenomena, birefringence of a medium whose principal axis direction is unclear is measured with high precision by measuring the maximum extinction ratio for various input light polarization directions. Ambiguity in retardation associated with angular function solution is removed by measurement at two adjacent wavelengths. The measurement principle of the new method is confirmed by applying it to a quarter wave plate made of quartz. Birefringence of a 3 m long ribbon fiber as small as 10-7 is successfully measured.
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Mitsuhiro TATEDA, Taku ISHIDATE, "Measurement of Small Birefringence in an Optical Fiber by Dual Wavelength Maximum Extinction Ratio Method" in IEICE TRANSACTIONS on Communications,
vol. E90-B, no. 10, pp. 2926-2930, October 2007, doi: 10.1093/ietcom/e90-b.10.2926.
Abstract: When a linearly polarized light is launched into a birefringent material, the output light is generally elliptically polarized. The ratio of the major and minor axes of the polarization ellipse varies depending on the angle between the polarization direction of the input light and the birefringent axis of the medium. The maximum ratio is determined only by the retardation due to the birefringence. Utilizing this phenomena, birefringence of a medium whose principal axis direction is unclear is measured with high precision by measuring the maximum extinction ratio for various input light polarization directions. Ambiguity in retardation associated with angular function solution is removed by measurement at two adjacent wavelengths. The measurement principle of the new method is confirmed by applying it to a quarter wave plate made of quartz. Birefringence of a 3 m long ribbon fiber as small as 10-7 is successfully measured.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.10.2926/_p
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@ARTICLE{e90-b_10_2926,
author={Mitsuhiro TATEDA, Taku ISHIDATE, },
journal={IEICE TRANSACTIONS on Communications},
title={Measurement of Small Birefringence in an Optical Fiber by Dual Wavelength Maximum Extinction Ratio Method},
year={2007},
volume={E90-B},
number={10},
pages={2926-2930},
abstract={When a linearly polarized light is launched into a birefringent material, the output light is generally elliptically polarized. The ratio of the major and minor axes of the polarization ellipse varies depending on the angle between the polarization direction of the input light and the birefringent axis of the medium. The maximum ratio is determined only by the retardation due to the birefringence. Utilizing this phenomena, birefringence of a medium whose principal axis direction is unclear is measured with high precision by measuring the maximum extinction ratio for various input light polarization directions. Ambiguity in retardation associated with angular function solution is removed by measurement at two adjacent wavelengths. The measurement principle of the new method is confirmed by applying it to a quarter wave plate made of quartz. Birefringence of a 3 m long ribbon fiber as small as 10-7 is successfully measured.},
keywords={},
doi={10.1093/ietcom/e90-b.10.2926},
ISSN={1745-1345},
month={October},}
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TY - JOUR
TI - Measurement of Small Birefringence in an Optical Fiber by Dual Wavelength Maximum Extinction Ratio Method
T2 - IEICE TRANSACTIONS on Communications
SP - 2926
EP - 2930
AU - Mitsuhiro TATEDA
AU - Taku ISHIDATE
PY - 2007
DO - 10.1093/ietcom/e90-b.10.2926
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2007
AB - When a linearly polarized light is launched into a birefringent material, the output light is generally elliptically polarized. The ratio of the major and minor axes of the polarization ellipse varies depending on the angle between the polarization direction of the input light and the birefringent axis of the medium. The maximum ratio is determined only by the retardation due to the birefringence. Utilizing this phenomena, birefringence of a medium whose principal axis direction is unclear is measured with high precision by measuring the maximum extinction ratio for various input light polarization directions. Ambiguity in retardation associated with angular function solution is removed by measurement at two adjacent wavelengths. The measurement principle of the new method is confirmed by applying it to a quarter wave plate made of quartz. Birefringence of a 3 m long ribbon fiber as small as 10-7 is successfully measured.
ER -