Tunable holmium-doped fiber laser with multiwatt operation from 2025 nm to 2200 nm.
Opt Lett
; 44(17): 4131-4134, 2019 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-31465346
ABSTRACT
The emission band of holmium-doped silica fibers extends beyond 2200 nm, which means these lasers have the potential of covering considerable parts of the atmospheric transmission window between â¼2100 nm and 2250 nm. However, efficient operation toward 2200 nm is challenging due to absorption in fused silica at the laser wavelength. Here we present a holmium-doped fiber laser specifically targeting long-wavelength operation. The laser is implemented as a high-feedback wavelength selective ring cavity and is tunable from 2025 nm to 2200 nm. A maximum slope efficiency of 58% is obtained at 2050 nm and a slope of 27% is obtained at 2200 nm. A power of 5.5 W from a single aperture (8.9 W total) is demonstrated at 2200 nm. Our results represent extended coverage of the 2 µm spectral band with multiwatt-level silica fiber lasers.
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MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2019
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Article