公开(公告)号：US20180152242A1

公开(公告)日：2018-05-31

申请号：US15723462

申请日：2017-10-03

Applicant: Fujitsu Optical Components Limited

Inventor： Masayuki Kurisu ,  Shuichi Yasuda

IPC: H04B10/079 ,  H04B10/61 ,  H04J14/06

CPC classification number: H04B10/0795 ,  H04B10/60 ,  H04B10/613 ,  H04B10/616 ,  H04B10/6166 ,  H04J14/02 ,  H04J14/06

Abstract: An optical receiver includes a processor. The processor calculates first through fourth optical intensities that respectively indicate input optical intensities of in-phase component in the first polarization, quadrature component in the first polarization, in-phase component in the second polarization and quadrature component in the second polarization. The processor calculates polarization dependent intensity ratio and phase dependent intensity ratio based on the first through fourth optical intensities. The processor calculates an input optical intensity of a polarization multiplexed optical signal based on an optical intensity of one of the first through fourth amplifiers, the polarization dependent intensity ratio, and the phase dependent intensity ratio.

公开(公告)号：US10044439B2

公开(公告)日：2018-08-07

申请号：US15723462

申请日：2017-10-03

Applicant: Fujitsu Optical Components Limited

Inventor： Masayuki Kurisu ,  Shuichi Yasuda

IPC: H04B10/08 ,  H04B10/06 ,  H04B10/00 ,  H04B10/079 ,  H04J14/06 ,  H04B10/61 ,  H04B10/60 ,  H04J14/02

Abstract: An optical receiver includes a processor. The processor calculates first through fourth optical intensities that respectively indicate input optical intensities of in-phase component in the first polarization, quadrature component in the first polarization, in-phase component in the second polarization and quadrature component in the second polarization. The processor calculates polarization dependent intensity ratio and phase dependent intensity ratio based on the first through fourth optical intensities. The processor calculates an input optical intensity of a polarization multiplexed optical signal based on an optical intensity of one of the first through fourth amplifiers, the polarization dependent intensity ratio, and the phase dependent intensity ratio.

公开(公告)号：US09647753B1

公开(公告)日：2017-05-09

申请号：US14993484

申请日：2016-01-12

Applicant: Fujitsu Optical Components Limited

Inventor： Masayuki Kurisu ,  Shuichi Yasuda ,  Takeyasu Tomioka

IPC: H04B10/06 ,  H04B10/079 ,  H04J14/02 ,  H04B10/61

CPC classification number: H04B10/07957 ,  H04B10/614 ,  H04B10/615 ,  H04J14/0221

Abstract: A coherent optical receiver includes: an attenuator that adjusts a power of an input optical signal; a mixer that mixes an optical signal output from the attenuator and local oscillator light; a photo detector that converts an optical signal output from the mixer into an electric signal; an amplifier that amplifies an output signal of the photo detector; a gain controller that controls a gain of the amplifier; a memory that stores dependence information that indicates a relation between an input optical power of an optical signal of a specified wavelength and a gain of the amplifier; and a controller that calculates an input optical power of the target wavelength based on a gain of the amplifier and the dependence information, and controls an attenuation amount of the attenuator based on the calculated input optical power, when a WDM optical signal is input into the coherent optical receiver.