US 12,136,997 B2
Polarization-fluctuation estimating device and polarization-fluctuation estimating method
Masaki Sato, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/914,442
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 4, 2021, PCT No. PCT/JP2021/008398
§ 371(c)(1), (2) Date Sep. 26, 2022,
PCT Pub. No. WO2021/205786, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2020-069132 (JP), filed on Apr. 7, 2020.
Prior Publication US 2023/0119766 A1, Apr. 20, 2023
Int. Cl. H04J 14/06 (2006.01); G01J 4/04 (2006.01); H04B 10/2507 (2013.01); H04B 10/079 (2013.01); H04B 10/61 (2013.01)
CPC H04J 14/06 (2013.01) [G01J 4/04 (2013.01); H04B 10/2507 (2013.01); H04B 10/0795 (2013.01); H04B 10/614 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A polarization fluctuation estimation device comprising:
a polarization de-multiplexer configured to generate a single-polarization optical signal from an input polarization-multiplexed optical signal;
a photoelectric converter configured to convert the generated optical signal into an electric signal; and
at least one processor configured to execute an estimator configured to perform estimation of polarization fluctuation speed of the polarization-multiplexed optical signal, based on amplitude of the electric signal.