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Hamamatsu Corp. - Earth Innovations LB 2/24

Photodetectors Test Pulsed Laser Diodes

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Helga Alexander

Testing laser diodes for fiber optic communications systems requires photodiodes with fast response times. But 10 to 90 percent rise times are not the only consideration, particularly when photodiodes are used for absolute optical power measurements in pulsed mode. Given that packaging adds 80 percent or more to the cost of a laser diode module, it is imperative to ensure that only good laser diode chips enter communications modules. This requires testing laser diodes at the bar or chip stage with pulse techniques that prevent destructive self-heating of uncooled devices. These techniques...Read full article

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    Published: December 2002
    CommunicationsenergyFeaturesSensors & Detectors

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