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Estimating Laser Diode Lifetimes and Activation Energy

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Estimating Laser Diode Lifetimes and Activation Energy

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  • Author: Patrick Gale
The estimation of laser diode lifetime is important to both manufacturers and users of laser diodes. For example, a manufacturer of a laser diode based sensor product may wish to know if the laser used in the product will deliver a median time to failure of at least five years of continuous use at a case temperature of 40°C. The answer to this question can be answered through statistical analysis of actual lifetime data. Since laser diode lifetimes can be into the 100,000 hour range it is generally not practical to test the laser diodes at normal operating ranges due to the long test time. In order to shorten the testing process, accelerated aging tests are performed at higher than normal temperature and operating currents.

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