公开(公告)号：US20190089475A1

公开(公告)日：2019-03-21

申请号：US16191974

申请日：2018-11-15

Applicant: Infinera Corporation

Inventor： Fred A. Kish, JR. ,  Michael Reffle ,  Jeffrey T. Rahn ,  John Osenbach ,  Timothy Butrie ,  Xiaofeng Han ,  Mark Missey ,  Mehrdad Ziari ,  Peter W. Evans

IPC: H04J14/02 ,  H04B10/50 ,  H04B10/079

Abstract: Consistent with the present disclosure, a photonic integrated circuit (PIC) is provided that has 2 N channels (N being an integer). The PIC is optically coupled to N optical fibers, such that each of N polarization multiplexed optical signals are transmitted over a respective one of the N optical fibers. In another example, each of the N optical fibers supply a respective one of N polarization multiplexed optical signals to the PIC for coherent detection and processing. A multiplexer and demultiplexer may be omitted from the PIC, such that the optical signals are not combined on the PIC. As a result, the transmitted and received optical signals incur less loss and amplified spontaneous emission (ASE) noise. In addition, optical taps may be more readily employed on the PIC to measure outputs of the lasers, such as widely tunable lasers (WTLs), without crossing waveguides.

公开(公告)号：US20190089476A1

公开(公告)日：2019-03-21

申请号：US16192032

申请日：2018-11-15

Applicant: Infinera Corporation

Inventor： Fred A. Kish, JR. ,  Michael Reffle ,  Jeffrey T. Rahn ,  John Osenbach ,  Timothy Butrie ,  Xiaofeng Han ,  Mark Missey ,  Mehrdad Ziari ,  Peter w. Evans

IPC: H04J14/02 ,  H04B10/50 ,  H04B10/079

Abstract: Consistent with the present disclosure, a photonic integrated circuit (PIC) is provided that has 2 N channels (N being an integer). The PIC is optically coupled to N optical fibers, such that each of N polarization multiplexed optical signals are transmitted over a respective one of the N optical fibers. In another example, each of the N optical fibers supply a respective one of N polarization multiplexed optical signals to the PIC for coherent detection and processing. A multiplexer and demultiplexer may be omitted from the PIC, such that the optical signals are not combined on the PIC. As a result, the transmitted and received optical signals incur less loss and amplified spontaneous emission (ASE) noise. In addition, optical taps may be more readily employed on the PIC to measure outputs of the lasers, such as widely tunable lasers (WTLs), without crossing waveguides.