Large nonlinear phase shifts in low-loss AlxGa1−xAs waveguides near half-gap
- 11 November 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 59 (20) , 2558-2560
- https://doi.org/10.1063/1.105952
Abstract
We study the instantaneous nonlinear index change in Al0.2Ga0.8As waveguides below the two‐photon absorption edge and find π phase shifts with 80 pJ, 0.4 ps pulses at wavelengths near 1.6 μm. These large phase shifts are obtained with less than 1 dB of loss from multiphoton absorption. Our results indicate that AlGaAs waveguides, which have a mature fabrication technology, can be used as compact nonlinear elements in switching and quantum optics applications in the near‐infrared. Further optimization of the waveguide geometry should result in useful nonlinear phase shifts and low losses for pulse energies approaching a picojoule.Keywords
This publication has 9 references indexed in Scilit:
- 16 Gbit/s all-optical demultiplexing using four-wave mixingElectronics Letters, 1991
- All-optical time-domain chirp switchesOptics Letters, 1991
- Dispersion and band-gap scaling of the electronic Kerr effect in solids associated with two-photon absorptionPhysical Review Letters, 1990
- Femtosecond measurements of the nonresonant nonlinear index in AlGaAsApplied Physics Letters, 1990
- Two-photon absorption as a limitation to all-optical switchingOptics Letters, 1989
- Color center lasers passively mode locked by quantum wellsIEEE Journal of Quantum Electronics, 1989
- Scaling rules for multiphoton interband absorption in semiconductorsJournal of the Optical Society of America B, 1984
- Self-phase-modulation in silica optical fibersPhysical Review A, 1978
- Two-photon absorption spectra of GaAs withnear the direct band gapPhysical Review B, 1977