| 主权项 |
1. An optical system comprising:
an optical demultiplexer circuit comprising:
a slab comprising a propagation region,
the propagation region comprising a first propagation section and a second propagation section,
a portion of the first propagation section and a portion of the second propagation section overlapping each other to form a shared propagation section, the shared propagation section including both the portion of the first propagation section and the portion of the second propagation section,the first propagation section having a first end and a second end,the second propagation section having a first end and a second end;a plurality of waveguides, each of the plurality of waveguides having a respective first end and a respective second end,
the first ends of the plurality of waveguides being directly connected to the second end of the first propagation section, andthe second ends of the plurality of waveguides being directly connected to the second end of the second propagation section;a first plurality of photodiodes optically coupled to the first end of the first propagation section; anda second plurality of photodiodes optically coupled to the first end of the second propagation section, where: the first end of the first propagation section is configured to receive at least one first input, the first end of the first propagation section is configured to provide a plurality of first outputs, the first end of the second propagation section is configured to receive at least one second input, the first end of the second propagation section is configured to provide a plurality of second outputs, the first ends of the plurality of waveguides are configured to receive the at least one first input, and the second ends of the plurality of waveguides are configured to receive the at least one second input the optical system further comprising: a polarization beam splitter comprising:
an input that receives an input optical signal; andfirst and second outputs,
the first output providing a first polarization optical signal having a first polarization, andthe second output providing a second polarization optical signal having a second polarization,where the at least one first input received by the first end of the first propagation section includes the first polarization optical signal or the at least one second input received by the first end of the second propagation section includes the second polarization optical signal. |
