A digital open-loop temperature compensation system for optical module lasers

Abstract

The invention relates to the field of optical communication, in particular to the laser temperature compensation technology, and discloses a digital open loop temperature compensation system of an optical module laser device. Temperature compensation is carried out on the laser device in an optical module through a digital open loop circuit to guarantee the stable output light power and the stable extinction ratio. Meanwhile, the operating temperature, the bias currents, the backlight currents, the operating voltage and the light collection power value of the digital open loop temperature compensation system are effectively monitored in real time, the power consumption of the optical module is greatly lowered, the risk of performance deterioration and failures of the optical module at high temperature for a long time is avoided, and stable operation of the system is guaranteed. Meanwhile, hardware of the scheme is simple, the cost is lower compared with an integrated dedicated chip scheme, and production is simple and practicable.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to the optical module laser temperature compensation technology. Background technique [0002] Optical modules are widely used in the field of optical communication and are a very critical component of optical communication equipment. At present, FP (Fabry-Perot Laser) Fabry-Perot lasers or DFB (Distributed Feedback Laser) distributed feedback lasers are generally used as light sources in optical modules, and the luminous slope efficiency and threshold current of such semiconductor lasers will vary with temperature. The luminous slope efficiency gradually decreases with the increase of the ambient temperature, while the threshold current increases with the increase of the ambient temperature. In order to maintain a constant output optical power and extinction ratio, the laser driver increases the bias current of the laser correspondingly with the increase of the ambie...

AI Technical Summary

Problems solved by technology

[0005] Although this closed-loop method can stabilize the optical power and extinction ratio, as the temperature rises, the bias current and modulation current will increase sharply, the power consumption of the optical module will increase, and the increase in power consumption will aggravate the rise in ambient temperature. High, such a vicious cycle leads to a decrease in the performance of the module, and makes the module prone to failure and failure in a high temperature environment

Images