公开(公告)号：US20240402430A1

公开(公告)日：2024-12-05

申请号：US18325909

申请日：2023-05-30

Applicant: Cisco Technology, Inc.

Inventor： Jonathan Edgar ROTH ,  Qianfan XU ,  Long CHEN

IPC: G02B6/293

Abstract: Disclosed is an adiabatic optical coupler. The adiabatic optical coupler includes a tapered input region which includes a first waveguide core and a second waveguide core. The first and second waveguide cores are separated at the tapered input region. The adiabatic optical coupler also includes a narrow coupling region extending from the tapered input region. In the narrow coupling region, the first and second waveguide cores are brought within close proximity and a third waveguide core is positioned between the first and second waveguide cores. The third waveguide core defines a longitudinal axis. The adiabatic optical coupler also includes a flared output region extending from the narrow coupling region. In the flared output region, the first, second, and third waveguide cores are separated.

公开(公告)号：US20240405883A1

公开(公告)日：2024-12-05

申请号：US18325933

申请日：2023-05-30

Applicant: Cisco Technology, Inc.

Inventor： Long CHEN ,  Qianfan XU ,  Jon ROTH

IPC: H04B10/61 ,  H04B10/294 ,  H04B10/50

Abstract: A receiver comprises at least two input ports. An optical signal containing n wavelengths is coupleable to one of these input ports. The receiver comprises a first demultiplexer coupled to a first input port to separate n wavelengths in the first input port onto n first multiplexer output ports, a second demultiplexer coupled to a second input port to separate the n wavelengths in the second input port onto n second multiplexer output ports, and a waveguide crossing matrix comprising an input side and an output side. The crossing matrix coupled to the n first and the n second multiplexer output ports on the input side and coupled to n shared photodetectors on the output side, one for each wavelength channel. Each of the photodetectors is coupled to one of the n first multiplexer output ports and one of the n second multiplexer output ports for the one wavelength channel.