OPTICAL SIGNAL PROCESSING DEVICE AND OPTICAL SIGNAL PROCESSING METHOD

WIPO Patent Application WO/2022/004798

A1

The present invention provides an optical signal processing device and an optical signal processing method which make it possible to acquire real parts and imaginary parts of complex amplitudes of two orthogonal polarized waves of signal light by a simple configuration. An optical signal processing device 10 causes signal light, and first local oscillation light and second local oscillation light that have polarization states orthogonal to each other to interfere with each other in an interference unit 15 to generate first to fifth interference light obtained by interference of the signal light and the first local oscillation light and the second local oscillation light in phase relationships different from one another. A light reception unit 16 receives the first to fifth interference light and outputs first to fifth light reception signals, and a difference unit 17 generates first to fourth difference signals that are differences between the first to fifth light reception signals. A digital signal processing unit 18 finds real part components and imaginary part components of complex amplitudes of two orthogonal polarized waves of the signal light, respectively, on the basis of the first to fourth difference signals.

SOMA GO (JP)
FUKUI TAICHIRO (JP)
TANEMURA TAKUO (JP)
TANOMURA RYOTA (JP)
ISHIMURA SHOTA (JP)
NAKANO YOSHIAKI (JP)

PCT/JP2021/024789

January 06, 2022

June 30, 2021

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UNIV TOKYO (JP)

G02F2/00; G02F1/225; H04B10/61

WO2019021917A1

2019-01-31

JP2012222733A	2012-11-12
US20190349093A1	2019-11-14

DORAIT IP LAW FIRM (JP)

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