Two-photon absorption and self-phase modulation in InGaAsP/InP multi-quantum-well waveguides

H. K. Tsang, R. V. Penty, I. H. White, R. S. Grant, W. Sibbett, J. B D Soole, H. P. Leblanc, N. C. Andreadakis, R. Bhat, M. A. Koza

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)3992-3994
Number of pages3
JournalJournal of Applied Physics
Volume70
Issue number7
DOIs
Publication statusPublished - 17 Aug 1991

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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