Method and device for stabilizing luminous power of optical module

Abstract

The invention relates to a method and a device for stabilizing the luminous power of an optical module. The method comprises the following steps of acquiring the current environmental temperature value of the optical module; searching an automatic power control (APC) compensation table according to the current environmental temperature value and acquiring the current optimal APC voltage value of the optical module under the current environmental temperature value; adjusting the bias current of the optical module according to the current optimal APC voltage value, so that when the luminous power of the optical module is changed due to rapid temperature change or high temperature, the bias current of the optical module can be directly adjusted according to the current optimal APC voltage value under the current environmental temperature value, the bias current of the optical module is adjusted to the current optimal bias current under the current environmental temperature value, the luminous power of the optical module can be stabilized according to the current optimal bias current, the influence of temperature on the optical module is reduced, and the light transmission performance of the optical module is improved.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a method and device for stabilizing the luminous power of an optical module. Background technique [0002] In the prior art, an optical module is a main component of an optical transmission device. The optical module includes a laser (LaserDiode, LD), a back photodetector (photoelectricity diode, PD), a driving circuit and a control unit MCU, etc. Due to the characteristics of the laser itself, the luminous efficiency of the optical module changes as the temperature changes. Especially at high temperature, the luminous efficiency of the optical module will decrease sharply, which affects the optical transmission performance of the optical module. [0003] In the prior art, when the laser works in the normal temperature range, if the luminous power changes, the monitoring current I back to the photodetector MD will change, the automatic power control (automatic power con...

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Problems solved by technology

[0005] The invention provides a method and device for stabilizing the luminous power of an optical module, which is used to solve the problem in the prior art that it is difficult for an APC closed-loop circuit to stabilize the luminous power of an optical module under a sharp temperature change or high temperature condition

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