Multi-channel receiver optical sub assembly module for fiber Bragg grating sensor

A multi-channel receiver optical sub assembly module for a fiber Bragg grating sensor, comprising:

• a housing having an accommodation space therein and including a light incident portion at one side thereof;
• a connection socket connected to the light incident portion of the housing;
• an optical bench made of a metal and disposed on an inner bottom of the housing;
• a thermoelectric cooler disposed on the optical bench;
• an arrayed waveguide grating chip disposed on the thermoelectric cooler and having a plurality of optical channels;
• a thermistor which senses a temperature of the arrayed waveguide grating chip;
• a photodiode array disposed on the optical bench and including a plurality of photodiode chips connected to the optical channels of the arrayed waveguide grating chip;
• and
• a printed circuit board which is connected to the other side of the housing while passing through the other side of the housing, of which a portion of a body is disposed on the optical bench, and which is connected to the photodiode array,
• wherein the arrayed waveguide grating chip is configured to allow wavelengths of four fiber Bragg grating sensors to be detected.