Automatic debugging and testing method and device for transmitting optical power and eye pattern of optical module

Abstract

The invention discloses an automatic debugging and testing method and device for transmitting optical power and an eye pattern of an optical module and belongs to the field of optical modules. The method comprises the steps that when the average emission light power is not in a first target range, debugging and testing of the light power are carried out according to the relation between the average emission light power and the first target range, and therefore the variation of a bias current and the variation of a modulation current meet a first preset relation until the average emission lightpower is in the first target range; when the extinction ratio of the light eye pattern is not in the second target range, the optical eye pattern is debugged and tested according to the relationshipbetween the extinction ratio and the second target range, the variation of the bias current and the variation of the modulation current are enabled to meet a second preset relation until the extinction ratio is within a second target range, and the final values of the bias current and the modulation current of the to-be-tested optical module are obtained according to the magnitude of the obtainedbias current and modulation current and the extinction ratio. According to the method disclosed in the invention, optical power and extinction ratio parameters can be quickly adjusted to the target range without manual intervention.

Description

technical field [0001] The invention belongs to the field of optical modules, and more particularly relates to an automatic commissioning method and device for transmitting optical power and an eye pattern of an optical module. Background technique [0002] With the layout and construction of the global network and the gradual advancement of the 5G network, the demand for optical modules in the international and domestic markets continues to increase, and the competition in the optical module industry is becoming increasingly fierce. Winning the competition has become the direction that all parties have been striving for. [0003] Optical module automatic testing is one of the important links in optical module manufacturing. Due to the poor consistency of optical module lasers, it is impossible to make the module performance meet the requirements through preset fixed parameters during mass production. It is often necessary to adjust the parameters. With the continuous incre...

AI Technical Summary

Problems solved by technology

The traditional commissioning method is to count the batch data and preset fixed parameters, which cannot meet the needs of different batches. Therefore, the traditional commissioning method cannot well ensure that the optical module can play the best performance of the laser.

[0004] Distributed feedback laser (Distributed-feedback laser, DFB) is currently the most commonly used laser type for 1.25G to 25G optical modules. In order to save costs, many manufacturers no longer use backlight diodes in the production process of Transistor Outline (TO). , which leads to the inability of the optical module to monitor the transmitted optical power, so that the laser must work in an open-loop state, and the automatic power control (Automatic Power Control, APC) function is no longer applicable. difficulty

Traditional commissioning methods are divided into manual commissioning and preset fixed parameters. Manual commissioning is also based on preset fixed parameters, which can maximize the best performance of devices, but requires long hours of work and depends on The technicality and proficiency of the operator and the defects of low efficiency, the commissioning method with preset fixed parameters is strongly dependent on the batch consistency, it is not easy to exert the best performance of the device, and has the defect of low yield

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