Hybrid-Pumped Gain-Switched Narrow-Band Thulium Fiber Laser
A hybrid-pumped gain-switched Tm 3+ fiber laser with an all-fiber configuration is demonstrated to achieve over 10 W 2 μm pulsed laser beams. This laser system is complementarily pumped by a 790 nm diode laser and a 1 μm pulsed Yb 3+ fiber laser. Based on the triggering effect of a 1 μm pulse pump,...
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| Published in | Applied physics express Vol. 5; no. 7; pp. 072702 - 072702-3 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
The Japan Society of Applied Physics
01.07.2012
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| Online Access | Get full text |
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| Summary: | A hybrid-pumped gain-switched Tm 3+ fiber laser with an all-fiber configuration is demonstrated to achieve over 10 W 2 μm pulsed laser beams. This laser system is complementarily pumped by a 790 nm diode laser and a 1 μm pulsed Yb 3+ fiber laser. Based on the triggering effect of a 1 μm pulse pump, most of the stored energy is efficiently transformed into the 2 μm laser pulse. The laser wavelength is centered at 2018.3 nm with a spectral bandwidth of 0.08 nm. The maximum pulse energy is 2 mJ with a pulse width of 500 ns, corresponding to a peak power of 4 kW. |
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| Bibliography: | Experimental setup of the hybrid-pumped gain-switched Tm 3+ fiber laser. Output power characteristics of the 2 μm Tm 3+ fiber laser at fixed switch power. Inset is the laser spectrum at the maximum output level. (a) Single 2 μm laser pulse and (b) laser pulse train at the switch frequency of 20 kHz. Schematic of energy level structure of Tm 3+ silica fibers and the mechanism of hybrid-pumped gain-switching operation. Each energy-level lifetime is shown in the bracket. NR: non-radiative relaxation; PI: population inversion. Laser pulse width changes with (a) 1053 nm pulse pump power and (b) 790 nm CW pump power. |
| ISSN: | 1882-0778 1882-0786 |
| DOI: | 10.1143/APEX.5.072702 |