| CPC G02B 6/4286 (2013.01) [G01S 7/4811 (2013.01); G01S 7/4818 (2013.01); G01S 7/497 (2013.01); G02B 6/28 (2013.01); G02B 6/4215 (2013.01); G01S 17/93 (2013.01)] | 14 Claims |
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1. A photonic chip, wherein the photonic chip has a first coupler, and the first coupler is configured to receive a first optical signal from outside the photonic chip, so that the first optical signal enters the photonic chip, and the photonic chip comprises:
a substrate;
a cladding layer provided on the substrate;
a first beam splitter embedded in the cladding layer, the first beam splitter comprising a first port, a second port, a third port, and a fourth port, wherein the first beam splitter is configured to output a light signal input from the first port through the third port and the fourth port, and to output a light signal input from the third port through the first port and the second port, the first port is connected to the first coupler and is configured to receive the first optical signal output by the first coupler;
an emitting waveguide module embedded in the cladding layer and connected to the third port, wherein the emitting waveguide module is configured to transmit at least a part of a first split light signal and emit the at least the part of first split light signal, and the first split light signal is a signal output by the first optical signal through the third port of the first beam splitter;
a receiving waveguide module embedded in the cladding layer and configured to receive an echo light signal, wherein the echo light signal is formed by the first split light signal being reflected by a target object:
a photoelectric detection module embedded in the cladding layer and connected to the receiving waveguide module and the fourth port, wherein the photoelectric detection module is configured to receive the echo light signal and a second split light signal, and the second split light signal is a signal output by the first optical signal through the fourth port of the first beam splitter; and
a first optical adjusting monitoring module provided on the cladding layer and connected to the second port, wherein the first optical adjusting monitoring module comprises a first photodetector, wherein the first optical adjusting monitoring module monitor an optical power of a return light received by the emitting waveguide module.
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