Narrow, high-NA GaAs/GaAlAs optical waveguides with losses below 0.7±0.1 dB cm-1

Abstract

Losses as low 0.65 dB cm-1 (3 μm width) and 0.3 dB cm-1 (8 μm width) have been measured (λ = 1.15 μm) in high-confinement (NA ≃ 0.45) GaAs/GaAlAs optical waveguides grown by MOCVD. The Fabry–Perot loss measurement technique used in deduced to be accurate to ±0.1 dB cm-1. These are the lowest losses reported for gudies of high electro-optic merit in III-V materials.