公开(公告)号：US20190109649A1

公开(公告)日：2019-04-11

申请号：US16157946

申请日：2018-10-11

Applicant: Finisar Corporation

Inventor： Gilles P. Denoyer ,  Dennis Pu ,  Homero Guimaraes ,  Faraz Monifi ,  Bryan Park ,  Daniel Mahgerefteh

IPC: H04B10/67 ,  H04B10/69

CPC classification number: H04B10/671 ,  H04B10/69

Abstract: An optical receiver with improved dynamic range may include at least one directional coupler having at least one input configured to couple to an optical fiber. The optical receiver may include a first signal path including a first photodetector coupled to an output of the at least one directional coupler, a first transimpedance amplifier (TIA) including an input coupled to the first photodetector, and an adder coupled to an output of the first TIA. The optical receiver may include a second signal path including a second photodetector coupled to an output of the at least one directional coupler, a second TIA including an input coupled to the second photodetector, and the adder coupled to an output of the second TIA. Further, the optical receiver may include an optical power sensing circuit coupled to at least one of the first TIA, the second TIA, and the adder.

公开(公告)号：US10797801B2

公开(公告)日：2020-10-06

申请号：US16157946

申请日：2018-10-11

Applicant: Finisar Corporation

Inventor： Gilles P. Denoyer ,  Dennis Pu ,  Homero Guimaraes ,  Faraz Monifi ,  Bryan Park ,  Daniel Mahgerefteh

IPC: H04B10/69 ,  H04B10/67

Abstract: An optical receiver with improved dynamic range may include at least one directional coupler having at least one input configured to couple to an optical fiber. The optical receiver may include a first signal path including a first photodetector coupled to an output of the at least one directional coupler, a first transimpedance amplifier (TIA) including an input coupled to the first photodetector, and an adder coupled to an output of the first TIA. The optical receiver may include a second signal path including a second photodetector coupled to an output of the at least one directional coupler, a second TIA including an input coupled to the second photodetector, and the adder coupled to an output of the second TIA. Further, the optical receiver may include an optical power sensing circuit coupled to at least one of the first TIA, the second TIA, and the adder.

公开(公告)号：US20190229813A1

公开(公告)日：2019-07-25

申请号：US16373847

申请日：2019-04-03

Applicant: Finisar Corporation

Inventor： Faraz Monifi ,  Bryan Park

IPC: H04B10/67 ,  H04B10/69

Abstract: A directional coupler may include a first waveguide and a second waveguide. The first waveguide may include an optical input port to receive an optical signal and a first output port. The second waveguide may include a terminated port and a second output port. The first and second optical waveguides may be configured to split the optical signal such that a first portion of the optical signal is directed to the first output port and a second portion of the optical signal is directed to the second output port. The first portion of the optical signal may include first substantially equal portions of a transverse magnetic (TM) polarization mode and a transverse electric (TE) polarization mode of the optical signal. The second portion of the optical signal may include second substantially equal portions of the TM polarization mode and the TE polarization mode of the optical signal.