Patent ID: 9157949
Filing Date: 2015-10-13
Classification: G01R,H02S,Y02E

Abstract:
1. A method of accelerating the aging of multiple lasers to thereby determine the failure of the lasers, the method comprising: providing a current source configured for supplying current in a plurality of short signal pulses; providing a first plurality of laser structures for reliability testing, wherein the first plurality of laser structures include a first facet coating; applying current from the current source to the first plurality of laser structures such that the first plurality of laser structures emit output light beams having an output power and optical intensity, the current being applied to the first plurality of laser structures in a plurality of short signal pulses so as to simulate the aging of the first plurality of laser structures; ascertaining failure of the first plurality of laser structures based on their response to the plurality of short signal pulses; providing a second plurality of laser structures for reliability testing, wherein the second plurality of laser structures include a second facet coating that is different from the first facet coating; applying current from the current source to the second plurality of laser structures such that the second plurality of laser structures emit output light beams having an output power and optical intensity, the current being applied to the second plurality of laser structures in a plurality of short signal pulses so as to simulate the aging of the second plurality of laser structures; ascertaining failure of the second plurality of laser structures based on their response to the plurality of short signal pulses; and comparing failures of the first and second plurality of laser structures to determine which of the first and second facet coatings caused their respective plurality of laser structures to be operated for a longer period of time without failure.