High-frequency intensity noise behaviour during accelerated life tests of narrow-stripe proton-isolated DH AlGaAs lasers for optical communications

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Abstract
An investigation has been made into the influence of life testing of narrow-stripe proton-isolated DH AlGaAs on their output fluctuation spectra in the range 0.1–1.6 GHz. The lasers show intrinsic optical fluctuation behaviour before life testing. The experiments indicate that this behaviour is maintained for facet-coated lasers during at least 5000 h of accelerated life testing at elevated temperatures.