1 May 1997 Aging behavior of high-power laser arrays monitored by photocurrent spectroscopy
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The well-known method of photocurrent spectroscopy, i.e. the measurement of the spectral sensitivity of a laser diode like for a detector, was found to monitor aging properties of (In)AlGaAs/GaAs high power laser diode arrays (LDA) in a convenient way. Photocurrent spectra of LDAs emitting at 808 nm (1.53 eV) were measured in the 0.8 - 3.0 eV photon energy range. Aging induced changes in different spectral regions reveal the influence of different mechanisms affecting the structure. Conclusions on the microscopic nature of the changes are drawn and applications are discussed.
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Jens Wolfgang Tomm, A. Baerwolff, Uwe Menzel, Ch. Lier, Thomas Elsaesser, Franz X. Daiminger, Stefan Heinemann, "Aging behavior of high-power laser arrays monitored by photocurrent spectroscopy", Proc. SPIE 3004, Fabrication, Testing, and Reliability of Semiconductor Lasers II, (1 May 1997); doi: 10.1117/12.273826; https://doi.org/10.1117/12.273826

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