Abstract
Applications of metal-semiconductor-metal (MSM) photodetectors as the front end of integrated optoelectronic receivers in high bit rate (>20Gbit / s) optical data transfer systems necessitates complete recovery of the detector on a timescale ≤50 ps. So far, MSM detectors have been tested by mode-locked dye and semiconductor lasers operating at repetition rates between 80 MHz and a few GHz. Here we report on extension of such measurements to pulse separations well below 10 ps and show that MSM detectors can resolve pulse trains with 50 GHz repetition rate if proper biasing and low excitation levels afford fast carrier collection, thus preventing severe crosstalk between subsequent pulses caused by space charge effects.
© 1993 Optical Society of America
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