Chinese Optics Letters, Volume. 22, Issue 8, 081405(2024)
High-power compact continuous-wave Fe:ZnSe laser at 4 µm with >50% overall conversion efficiency Editors' Pick
Figures & Tables(8)
Fig. 1. Schematic layout of the 2.9 µm fiber-laser-pumped CW Fe:ZnSe laser of the BP scheme. Inset, partial energy levels of Fe2+ ions involving pump absorption and laser emission.
Fig. 2. Output powers of FP and BP as a function of launched pump power. Inset, the beam profile of BP at the maximum output power.
Fig. 3. Output spectra of the Fe:ZnSe laser (BP) at low and high output powers.
Fig. 5. The measured long-term stability at an output power of ∼5 W in the BP scheme over a 1 h period with a power meter with a response time of 0.6 s.
Fig. 6. Calculated output power as a function of launched pump power.
Table 1. State-of-the-Art CW Fe:ZnSe Lasers
View tableView in ArticleTable 1. State-of-the-Art CW Fe:ZnSe Lasers
Pump Source Fe:ZnSe Laser ηb a ηo b Reference Cr:CdSe laser (0.6 W at 2.97 µm) 160 mW <56% 26.7% [ 17 ]Two Er:YAG lasers (total 3 W at 2.94 µm) 840 mW ∼40% 28% [ 2 ]Er:Y2O3 (3.15 W at 2.74 µm) 420 mW 17.3% 13.3% [ 18 ]Cr:ZnSe (23 W at 2.94 µm) 9.2 W 41.2% 40.0% [ 19 ]Er:ZBLAN laser (6.5 W at 2.8 µm) 2.1 W <59% 32.3% [ 24 ]Er:YAP laser (3.6 W at 2.92 µm) ∼1 W <48.2% 27.8% [ 20 ]Fluoride fiber laser (10.1 W at 2.91 µm) 5.5 W 66.3% 54.5% This work
Table 2. Parameters of the Fe:ZnSe Laser
View tableView in ArticleTable 2. Parameters of the Fe:ZnSe Laser
Parameter Value Parameter Value σgsa 0.94 × 10−18 cm2[ 25 ]τf 57 µs[ 27 ]σse 1.1 × 10−18 cm2[ 25 ]Nt 5 × 1018 cm−3 σesa/σgsa 0.12[ 32 ]ΔASE 1.13 µm[ 25 ]l Variable αp 0.01 cm−1 λp/λs 2.9 µm/4.1 µm n 2.4 R1 0.99 R2 0.65
Tools
Get Citation
Copy Citation Text
Yanlong Shen, Yingchao Wan, Feng Zhu, Tongxing Chai, Yousheng Wang, Ke Huang, "High-power compact continuous-wave Fe:ZnSe laser at 4 µm with >50% overall conversion efficiency," Chin. Opt. Lett. 22, 081405 (2024)
Paper Information
Category: Lasers, Optical Amplifiers, and Laser Optics
Received: Mar. 16, 2024
Accepted: Apr. 16, 2024
Published Online: Aug. 21, 2024
The Author Email: Yanlong Shen (yanlong_xian@126.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20