Picosecond GaAs monolithic optoelectronic sampling circuit

An optoelectronic sampling circuit has been fabricated for direct measurement of picosecond optical waveforms. The monolithic device incorporates a GaAs Schottky photodetector and a high-speed sampling circuit gated by a nonlinear transmission line strobe pulse generator. Excited by a 850-nm mode-locked dye laser, a 5.6-ps FWHM impulse response is measured; the authors estimate a deconvolved impulse response of approximately 4.5 ps FWHM.<
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