Ultrafast optical thresholding based on two-photon absorption GaAs waveguide photodetectors
- 1 April 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (4) , 493-495
- https://doi.org/10.1109/68.559399
Abstract
We report measurements of the pulsewidth dependence of the two-photon absorption photocurrent in GaAs p-i-n waveguide photodetectors using subpicosecond optical pulses at 1.5 /spl mu/m. For fixed pulse energy, the photocurrent is observed to depend linearly on the inverse of the optical pulsewidth. A subnanosecond electrical response is also observed. Our results show the feasibility of applying such devices for nonlinear processing in ultrafast optical code-division multiple-access and other ultra high-speed optical network applications.Keywords
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