发明名称 |
Adaptive polarization diversity detection scheme for coherent communications and interferometric fiber sensors |
摘要 |
A method and apparatus for overcoming polarization induced signal fading in both heterodyne communication and interferometric sensing. An adjustable birefringent element in series with a linear-polarization beam splitter forms an elliptical-polarization beam splitter. The birefringent element controllably evolves the states of polarization of two input signals thereby controlling the power contribution of each signal onto the orthogonal axes used by the linear beam splitter. When the states of polarization are evolved such that there are equal signal to reference power ratios on the beam splitter axes, subsequent detectors generate a constant, optimum amplitude signal without the need for weighting or decision circuits.
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申请公布号 |
US5440414(A) |
申请公布日期 |
1995.08.08 |
申请号 |
US19900473807 |
申请日期 |
1990.02.02 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
KERSEY, ALAN D.;MARRONE, MICHAEL J.;DANDRIDGE, ANTHONY |
分类号 |
H04B10/148;(IPC1-7):G02B5/30 |
主分类号 |
H04B10/148 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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