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Repeatability of Laser Diode Threshold Current Measurement

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Repeatability of Laser Diode Threshold Current Measurement

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This technical note presents the results of measurement repeatability of threshold current on three batches of laser diode samples performed using the LRS-9424 Laser Reliability and Burn-In Test System.Change in threshold current is commonly used as pass/fail criteria for screening laser diodes during production burn-in. In a typical test, lasers with a shift in threshold of greater than 10% would be removed from the production run and scrapped. In order to maximize yield through the burn-in and test process, it is important to maximize the repeatability of threshold current measurement.

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