AN YTTERBIUM-DOPED MONOMODE FIBER LASER - BROADLY TUNABLE OPERATION FROM 1.010 MU-M TO 1.162 MU-M AND 3-LEVEL OPERATION AT 974NM

Continuous-wave laser action has been observed from an ytterbiumdoped monomode fibre laser on the three-level transition at 974 nm and on the four-level transition at 1036 nm with slope efficiencies of 67% and 77% respectively, with respect to absorbed power. Tuning behaviour is described, in which polarisation control by means of fibre loops has allowed smooth continuous tuning from 1.010 μm to 1.162 μm. © 1990 Taylor & Francis Ltd.