Optical module and its detection circuit

Abstract

The application discloses an optical module and a detection circuit thereof. The detection circuit includes: a detection circuit, the detection circuit includes: a sampling module, the sampling module includes a first potentiometer, and the first potentiometer is used to convert the sampling current into a sampling voltage; an amplification module, coupled to The output end of the sampling module is used to amplify the sampling voltage; the analog-to-digital conversion module is coupled to the output end of the amplifying module, and converts the amplified sampling voltage into a digital signal for detection. Setting the potentiometer in the sampling module of the detection circuit can adjust the resistance of the sampling module, so as to adapt to the responsivity of different modulators, improve the locking speed of the modulator, prevent the locking point from jumping left and right, and the locking point error, and reduce the The area occupied by the PCB board.

Description

technical field [0001] The present application relates to the field of optical communication, in particular to an optical module and a detection circuit thereof. Background technique [0002] When performing optical communication, the optical carrier must be sent to the modulator at the sending end for modulation to load data information on the optical carrier for transmission. However, modulators are usually mainly composed of simple optical elements, which are easily affected by changes in the external environment, thus affecting the output modulated signal. In order to reduce the influence of the outside world on the modulator, the DC bias point of the modulator must be changed as the outside world changes. Therefore, the signal at the output of the modulator must be detected. [0003] The prior art proposes a detection circuit, which converts the sampling current into a sampling voltage through a sampling resistor, and then feeds it back to the modulator. When the out...

AI Technical Summary

Problems solved by technology

However, the responsivity of different modulators varies greatly, resulting in slow locking speed of the modulator, jumping around the locking point, wrong locking point, etc.

[0004] The prior art also provides another detection circuit, which sets multiple sampling resistors and selects the sampling resistors through switches. In this case, although the adaptability to the responsiveness of the modulator can be improved, this In this case, the detection circuit is very complicated and takes up a lot of PCB area, which is not conducive to the miniaturization of the instrument.

Images