Patent ID: 11874362
Assignee: SHANGHAI JIAO TONG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. The LiDAR transmitter according to claim 1, wherein the N×M optical beam expanding network comprises a K-stage expanding array and connecting waveguides connecting adjacent two-stage expanding arrays, and a kth stage expanding array consists of N×k 1×2 optical beam splitters and N×k 180° phase shifters, wherein (k=1, 2, . . . , K);
the N×M optical beam expanding network has N input ports and M output ports, wherein M=N×2K (K=1, 2, . . . ), and the ith input port of the N×M optical beam expanding network is connected with the ith output port of the N×N Butler optical matrix network; and
the N×M optical beam expanding network evenly distributes and expands N-path optical signals output from the N×N Butler optical matrix network into M-path optical signals, adjacent output signals have equal phase differences, and the phase differences of the output signals are consistent with the phase differences of the input signals.