Programmable two-dimensional simultaneous multi-beam optically operated phased array receiver chip and multi-beam control method

A programmable two-dimensional simultaneous multi-beam light-operated phased array receiver chip, comprising an indium phosphide (InP) photonic chip and a silicon-on-insulator (SOI) photonic chip that are heterogeneously integrated;

• wherein
• the InP photonic chip integrates q distributed feedback (DFB) lasers and q semiconductor optical amplifiers (SOAs), wavelengths of optical signals output by the q DFB lasers are λ1, λ2, . . . , λq-1 and λq, optical output ports of the q DFB lasers are respectively connected to input ports of the q SOAs, the optical signals output by the DFB lasers on the InP photonic chip are amplified by the corresponding SOAs and are input to input ports of corresponding silicon nitride optical power splitters (SiN-OPSs) on the SOI photonic chip;
• the SOI photonic chip integrates q SiN-OPSs, denoted as SiN-OPSq, each having 1 stages of 1×2 SiN-based multimode interferometers (SiN-MMIs), each SiN-OPS has 2l output ports, the output port of SiN-OPSq is denoted as SiN-OPSq-Ok, 1≤k≤2l, and k is an integer;
• each SiN-OPSq-Ok is cascaded with a corresponding silicon modulator;
• the SOI photonic chip further integrates 2l 1×q SiN-based optical wavelength multiplexers (SiN-WDMs), denoted as SiN-WDMk;
• each SiN-WDM has q optical input ports connected to the corresponding silicon modulator, and each SiN-WDM has one optical output port for synthesizing q optical signals with different wavelengths into one optical signal for transmission;
• the optical output port of each SiN-WDM is cascaded with two different SiN-based optical true time delay lines (SiN-OTTDLs) SiN-OTTDL1 and SiN-OTTDL2;
• the SiN-OTTDL1 comprises m+1 stages of 2×2 silicon nitride optical switches (SiN-OSs) and m stages of delay lines-reference waveguides that are cascaded, both the reference waveguide and the delay line are SiN single-mode waveguides, and delay is realized only by changing a length difference between the reference waveguide and the delay line;
• and the SiN-OTTDL2 comprises n+1 stages of 2×2 SiN-OSs and n stages of delay lines-reference waveguides that are cascaded, and the delay line is a dispersor;
• the 2×2 SiN-OS comprises two 2×2 SiN-MMIs and two SiN thermo-optic phase shifters that are cascaded, and voltages applied to the thermo-optic phase shifters on the 2×2 SiN-OS are regulated to switch the optical signal between the two ports to achieve delay regulation;
• and
• an output port of the SiN-OTTDL2 is cascaded with germanium silicon photodetectors (GeSi-PD), and electrical signals demodulated through 2l GeSi-PDs are output to a peripheral electrical synthesizer for synthesis.