System and method for monitoring and controlling temperature and optical power of optical waveguide device in situ

Abstract

The invention discloses a system and a method for monitoring and controlling the temperature and the optical power of an optical waveguide device in situ. The system comprises the steps of measuring the admittance variation of an optical waveguide at different frequencies through CLIPP, and simultaneously monitoring the optical power and the temperature of an integrated optical waveguide device in situ by combining with the function relation at different test frequencies; and enabling a feedback control circuit to feed back and control the temperature and the optical power of the integrated optical waveguide device according to the admittance variation obtained by a signal reading circuit. The method comprises the following steps: selecting a plurality of driving frequencies, and respectively fitting a binary function relationship among temperature, optical power and admittance variation; reading the admittance variation of the CLIPP under the driving frequencies, and reversely deducing the temperature and the optical power of the integrated optical waveguide device; using the temperature and the optical power, obtained by the signal reading circuit, of the integrated optical waveguide device, enabling a PID regulator to feed back and adjust the current provided for the TEC by the temperature controller and the output optical power of a laser, and adjusting the temperature and the optical power of the integrated optical waveguide device to set values.

Description

technical field [0001] The invention relates to the field of optoelectronic devices, in particular to a system and method for in-situ monitoring and controlling the temperature and optical power of an optical waveguide device. Background technique [0002] Integrated optical waveguide devices generally refer to optical devices with a single function made of semiconductor materials through micro-nano processing, including: directional couplers, arbitrary waveguide gratings, optical waveguide integrated detectors, micro-ring resonators, etc. The waveguide is the main body, the scale is on the order of nanometers or micrometers, and it can be integrated on a large scale. The integrated optical waveguide chip is composed of a variety of integrated optical waveguide devices to achieve specific functions, such as: routing, beam phase control, etc. [0003] Integrated optical waveguide devices require real-time temperature monitoring and temperature feedback control to ensure that...

AI Technical Summary

Problems solved by technology

[0007] When there is a temperature difference between the fixed position of the commercial temperature sensor and the integrated optical waveguide device, the commercial temperature sensor cannot accurately monitor the actual temperature of the optical waveguide; when the temperature of the optical waveguide changes, it will cause the optical waveguide obtained by CLIPP to monitor the change in admittance. The optical power of the waveguide is not accurate

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