Abstract
The single-frequency Holmium-doped fiber laser with spectral filtration based on a dynamics filter formed in Holmium-doped fiber is presented. The possibility of continuous wave laser operation with the filter cooling is demonstrated. The filter was cooled in a special container using liquid nitrogen. It is assumed that a more uniform temperature distribution in the Ho-doped absorbed fiber is achieved in this case. Also, the polarization maintaining elements were applied to stabilize the laser operation regime. Single-frequency radiation in the region of 2.1 μm with an output power of 4 mW is obtained. The developed source can be used for gas spectroscopy as well as for remote atmosphere sensing. This becomes possible due to the presence of absorption lines of some atmospheric gases in this area. These gases include carbon dioxide, nitric oxide, ammonia, carbon monoxide and others. Spectral analysis of the elements can be used in bioatmospheric analysis, medicine and security.
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