14 August 2003 Recent advances in photodetectors with distributed optical amplification
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Abstract
For the past few years, we have been researching a novel type of photodetector featuring distributed optical amplification. We call these devices traveling-wave amplifier-photodetectors, or TAP detectors. The distributed combination of gain and absorption seeks a larger efficiency while keeping a low optical power, thus avoiding saturation. In this paper, we present experimental results both of GaAs- and InP-based TAP detectors, showing in the former case an external quantum efficiency larger than 200%, and larger than 100% in the latter. The performance limitation is shown to be related to the competition between the optical input signal and the amplified spontaneous emission (ASE) generated in the amplifier.
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Daniel Lasaosa, Donato Pasquariello, Joachim Piprek, John Edward Bowers, "Recent advances in photodetectors with distributed optical amplification", Proc. SPIE 5246, Active and Passive Optical Components for WDM Communications III, (14 August 2003); doi: 10.1117/12.531987; https://doi.org/10.1117/12.531987
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