
- High Power Laser Science and Engineering
- Vol. 8, Issue 2, 02000e25 (2020)
Abstract
1 Introduction
High-power solid-state lasers in the
The laser performance in the CW regime is investigated in the present work by utilizing a high-brightness Tm-fiber laser at 1908 nm for the resonant pumping of a Ho:YAG SCF grown by the micro-pulling-down (
2 Experimental details
YAG (
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Figure
3 Results and discussion
High-power CW operation of the Ho:YAG SCF laser was studied at a physical cavity length of 45 mm using different OCs. The low signal single-pass absorption efficiency of the SCF under nonlasing conditions amounted to 94.7% at 1.9 W of incident pump power. Further increasing the pump power to 71.3 W, the absorption efficiency dropped to 82.5% due to the bleaching effect. Under lasing conditions with
To evaluate the propagation loss of the SCF, Caird analysis that was modified for the case of high
Far-field beam intensity profiles of the Ho:YAG SCF laser with
The beam propagation factors (
4 Conclusion
In conclusion, we have experimentally demonstrated a high-power Ho:YAG SCF laser inband pumped by a Tm-fiber laser at 1908 nm. With a modified Caird analysis, the propagation loss coefficient of this Ho:YAG SCF was estimated to be
The present work is a demonstration of the high quality of the fabricated Ho:YAG SCF. Amplification of ultrashort pulses (including picosecond and femtosecond) near 2
Funding
Foundation of Deutscher Akademischer Austauschdienst (DAAD) – Research Stays for University Academics and Scientists (57381327); Natural Science Foundation of Jiangsu Province, China (SBK2019030177); China Scholarship Council (201704910363); Foundation of the Government of the Russian Federation (074-U01).
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