Two-photon absorption and self-phase modulation in InGaAsP/InP multi-quantum-well waveguides
- 1 October 1991
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 70 (7) , 3992-3994
- https://doi.org/10.1063/1.349168
Abstract
We report the first measurement of two-photon absorption (TPA) and self-phase modulation in an InGaAsP/InP multi-quantum-well waveguide. The TPA coefficient, β2, was found to be 60±10 cm/GW at 1.55 μm. Despite operating at 200 nm from the band edge, self-phase modulation as high as 8±2 rad was observed for 30-ps optical pulses at 3.8-W peak input power. A theoretical calculation indicates that this enhanced phase modulation is primarily due to bandfilling in the quantum wells and the free-carrier plasma effect.This publication has 8 references indexed in Scilit:
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