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All-fiber short-wavelength tunable mode-locked fiber laser using normal dispersion thulium-doped fiber.
- Source :
-
Optics express [Opt Express] 2020 Jun 08; Vol. 28 (12), pp. 17570-17580. - Publication Year :
- 2020
-
Abstract
- We report an all-fiber high pulse energy ultrafast laser and amplifier operating at the short wavelength side of the thulium (Tm) emission band. An in-house W-type normal dispersion Tm-doped fiber (NDTDF) exhibits a bending-induced distributed short-pass filtering effect that efficiently suppresses the otherwise dominant long wavelength emission. By changing the bending diameter of the fiber, we demonstrated a tunable mode-locked Tm-doped fiber laser with a very wide tunable range of 152 nm spanning from 1740 nm to 1892 nm. Pulses at a central wavelength of 1755 nm were able to be amplified in an all-fiber configuration using the W-type NDTDF, without the use of any artificial short-pass filter or pulse stretcher. The all-fiber amplifier delivers 2.76 ps pulses with an energy of ∼32.7 nJ without pulse break-up, due to the normal dispersion nature of the gain fiber, which marks so far, the highest energy amongst fiber lasers in the 1700 nm-1800 nm region.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 28
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 32679963
- Full Text :
- https://doi.org/10.1364/OE.395167