Light Amplification in a Thin Film
- 15 April 1972
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 20 (8) , 313-314
- https://doi.org/10.1063/1.1654163
Abstract
Light amplification at 6328 Å in a rhodamine‐B‐doped polyurethane thin film is observed. The light‐guiding thin film is pumped transversely with a nitrogen laser. Superradiant light of the dye‐doped film is observed to be guided by the thin film. When a He–Ne light at 6328 Å is coupled into the same thin film along the same path, amplification results. Maximum unsaturated gain on the order of 13 cm−1 was experimentally determined by two different methods in a single‐mode thin‐film light guide with a concentration of 3.3×10−2 mol/liter when wet.Keywords
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