Digital open loop temperature compensation system of optical module laser device

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 involves the field of optical communication technology, which specializes in the temperature compensation technology of light module laser. Background technique [0002] Light modules are widely used in the field of optical communication, which is a very critical part of optical communication equipment.At present, FP (FABRY-PEROT LASER) Fabri-Pero-Pero Laser is generally used in the light module or DFB (Distributed Feedback Laser) distributed feedback laser as a light source, and the light and threshold current of these semiconductor lasers will follow the temperature with the temperatureThe change of changes; the light -emitting inclined efficiency gradually decreases as the environmental temperature rises, and the threshold current increases with the increase of the ambient temperature.In order to maintain a constant output optical power and anti -light ratio, the laser driver increases the bias current of the laser accordingly with the incr...

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