Abstract
A 1.94μm Tm-doped fiber laser pumped tunable single-longitudinal-mode Ho:YLF laser with double etalons was reported for the first time. The maximum single-longitudinal-mode output power of 345mW at 2051.6nm was achieved at the absorbed pump power of 11.9W, corresponding to a slope efficiency of 5.5% and an optical conversion efficiency of 2.9%. By regulating the angle of the F–P etalons, the output wavelength of the laser can be tuned from 2051.6nm to 2063.3nm. The single-longitude-mode Ho:YLF laser operating at 2μm can be used as the seed laser source of coherent Doppler lidar, differential absorption lidar and so on.
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