Semiconductor laser ageing method

Abstract

A multi-channel semiconductor laser aging method, the semiconductor laser diodes LD are installed one by one on the multi-channel LD test and aging fixture, and the fixture is connected with a multi-channel constant power control circuit equipped with a power supply and connected with a central analysis and control computer; The computer first tests the constant power resistor that matches a certain LD on the fixture, and then connects the power control circuit unit that matches the LD in the multi-channel constant power control circuit, so that the LD is in the same or similar condition as the actual working condition. Aging is carried out in an environment, and then the remaining LDs to be tested are subjected to the aforementioned steps one by one. Most of the equipment used in the present invention is the transformation of existing equipment, which makes the circuit of the equipment simpler, more reliable, and more convenient to operate. It can be aged only by connecting the power supply; the aging efficiency is high, and the aging result is more accurate and practical; It is free of debugging and works with constant power, so that the LD will not be damaged.

Description

technical field [0001] The invention relates to a semiconductor device detection method, in particular to a semiconductor laser aging detection method and equipment used therein. Background technique [0002] The aging of semiconductor lasers (hereinafter referred to as LD) is a production inspection process that manufacturers must go through before leaving the factory. Only LDs that have passed aging screening can ensure their quality and service life. There are many traditional laser aging screening methods and equipment, such as the U.S. "5172365" patent discloses a laser life testing system, and the applicant's patent application number "01129827.8" also discloses a laser aging screening equipment and screening method . The aging process scheme disclosed in these patents is: install the laser on a special fixture → adjust the potentiometer or change the value of the D / A conversion to change the working current of the laser → detect the power and other parameters of the ...

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Problems solved by technology

[0003] In addition, in the traditional aging method, in order to reduce the LD damage caused by the above-mentioned debugging, a constant current aging method is also adopted, that is, a constant current is applied to all LDs for aging. The large distribution range of LD operating current will cause over-current aging of some LDs (that is, the set constant current value is greater than its operating current value) to affect its life, while the other part of LDs work in an undersaturated state (that is, the set constant current value) The constant current value is less than its working current value) so that it does not have the effect of aging

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