Peer-Reviewed Journal Details
Mandatory Fields
Skovgaard, PMW,Mullane, RJ,Nikogosyan, DN,McInerney, JG;
Optics Communications
Two-photon photoconductivity in semiconductor waveguide autocorrelators
Optional Fields
two-photon absorption photoconductivity femtosecond pulses autocorrelation 2-PHOTON ABSORPTION
We study experimentally and theoretically the mechanism of photocurrent generation in GaAs/AlGaAs waveguide heterostructure diodes by pulsed and CW radiation over wide ranges of average incident power and waveguide length. We confirm the importance of two-photon absorption in non-linear photocurrent generation and suggest that SHG mechanism is negligible. We determine the dynamic range in which the diode has a quadratic response to the incident optical peak power and hence is suitable for autocorrelation measurements of ultrashort optical pulses. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
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