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LRS-9434 Threshold Current Measurement Repeatability

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LRS-9434 Threshold Current Measurement Repeatability

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This technical note presents the results of measurement repeatability of threshold current on a batch of laser diode samples using the LRS-9434 Laser Reliability and Burn-In Test System. Additional system ReliaTest software features and operating environment considerations are noted to best mitigate possible sources of variation of the end user’s test results.Change in threshold current (I th) is commonly used as a pass/fail criteria for screening laser diodes during production burn-in. Generally, lasers with a shift in threshold of greater than 10% would be removed from the production run and scrapped. In order to optimize yield through the burn-in and test process, it is important to ensure the utmost repeatability of threshold current measurements.

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