A laser diode falls under the category of optoelectronics which is a branch of electronics that deals with light-emitting and light-detecting devices.
Laser diode testing, explained by RP; performance, reliability
Laser Diode Test System for Characterization, Burn-in
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9 Novembre 1957 – Invention du Laser - Nima REJA
Ushio launches new 405 nm, 600 mW, ESD-resistant laser diodes
Laser diode reliability test system – short pulse compatible
Laser Diode Burn-in and Reliability Test System (Model 58604
9 Novembre 1957 – Invention du Laser - Nima REJA
Fiber-Coupled 458nm, 200mW Laser Source System by Coherent
Laser Diode Reliability - ScienceDirect
Bar Tester VMSB3000
Semiconductor laser diode aging and reliability testing system