Abstract

Optical pulses from a GaAlAs laser diode directly modulated at a frequency f0 (971 MHz) are mixed in a LiIO3 crystal with optical sampling pulses at a frequency of f0 − 10 Hz from a mode-locked GaAlAs laser diode. The optical signal obtained by sum-frequency mixing in the crystal is observed with a photomultiplier and an oscilloscope. The original pulse waveform is reproduced clearly with a temporal resolution equal to the mode-locked laser-diode pulse width and at a repetition frequency of 10 Hz. Similar results are obtained with InGaAsP laser diodes at a wavelength of 1.3 μm.

© 1986 Optical Society of America

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