An automatic commissioning method and device for transmitting optical power and eye diagram of an optical module

Abstract

The invention discloses a method and device for automatic commissioning and testing of optical module transmit optical power and eye diagram, belonging to the field of optical modules. The realization of the method includes: when the average transmit optical power is not in the first target range, according to the average transmit optical power and The relationship of the first target range is used to adjust the optical power, so that the variation of the bias current and the variation of the modulation current meet the first preset relationship until the average emitted optical power is in the first target range; in the extinction of the optical eye diagram When the ratio is not in the second target range, the optical eye diagram is adjusted according to the relationship between the extinction ratio and the second target range, so that the variation of the bias current and the variation of the modulation current satisfy the second preset relationship until the extinction ratio is within In the second target range, the final values ​​of the bias current and the modulation current of the optical module to be tested are obtained according to the obtained magnitudes of the bias current and the modulation current and the extinction ratio. Through the invention, the parameters of optical power and extinction ratio 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 a method and a device for automatic adjustment and measurement of the emitted optical power and eye diagram 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] The automatic test of optical modules is one of the important links in the manufacture of optical modules. Due to the poor consistency of the lasers of optical modules, it is impossible to preset the fixed parameters to make the module performance meet the requirements during mass production. It is often necessary to adjust the parame...

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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