1.3μm GaInAsP near-travelling-wave laser amplifiers made by combination of angled facets and antireflection coatings

Abstract

1.3μm GaInAsP near-travelling-wave laser amplifiers have been realised by the combination of angled facets and antireflection coatings. Without in situ monitoring on the device itself during dielectric coatings, we can routinely obtain a low effective modal facet reflectivity of 5–8 × 10−4. The devices had an internal gain of 24 ± 1.5 dB for the TE mode and a single-mode fibre coupling loss of 5 dB/facet.