Abstract
We report measurements of optical loss in GaAs/Al2O3 nonlinear waveguides over the spectral range 1.3-2.1 mum in the infrared using a scattering technique. The optical source was a tunable femtosecond optical parametric oscillator (OPO) generating output pulses with durations of 200-250 fs at a repetition rate of similar to90 MHz and an average power of similar to50 mW. Loss coefficients of similar to1.15-2.55 cm(-1), corresponding to losses of similar to5-11 dB/cm were obtained from the measured data. The loss decreases with increasing wavelength due to the Rayleigh scattering contribution. (C) 2002 Elsevier Science B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 223-228 |
Number of pages | 6 |
Journal | Optics Communications |
Volume | 213 |
Issue number | 4-6 |
DOIs | |
Publication status | Published - 1 Dec 2002 |
Keywords
- optical loss
- scattering technique
- semiconductor waveguide
- two-photon absorption
- nonlinear frequency conversion
- GUIDE LOSS-MEASUREMENT
- WELL WAVE-GUIDES
- REFRACTIVE-INDEX
- BAND-GAP
- GAAS
- ABSORPTION
- GENERATION
- ALGAAS
- HALF