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Single-mode direct-ultraviolet-written channel waveguide laser in neodymium-doped silica on silicon

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Abstract

A waveguide laser with a neodymium-doped silica core is fabricated on a silicon substrate by a combination of flame hydrolysis deposition, solution doping, and direct UV writing. The neodymium-ion concentration is estimated to be 8000 parts in 106. The propagation loss around 1.05 µm is <0.8 dB/cm. Lasing in the range 1048–1056 nm and 1356±1 nm is observed. A slope efficiency of 33% for a high-reflectivity output coupler and a threshold of 4 mW of absorbed power for a 25% output coupler are measured for the F43/2I411/2 transition.

© 2004 Optical Society of America

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