Chinese Optics Letters, Volume. 22, Issue 1, 011403(2024)
14.1 W continuous-wave dual-end diode-pumped Er:Lu2O3 laser at 2.85 µm
Figures & Tables(8)
Fig. 1. Simplified energy levels of the Er3+ ions and the energy transfer mechanism.
Fig. 2. Laser schemes of (a) the single-end-pumped and (b) the dual-end-pumped Er:Lu2O3 lasers.
Fig. 3. Laser characteristics of (a) the single-end-pumped and (b) the dual-end-pumped setups for different T by using 35:200 and 35:200:200 lens group, respectively.
Fig. 4. Laser characteristics of the TEC-cooled (a) single- and (b) dual-end-pumped setup resonator with different OC transmissions.
Fig. 5. (a) Power instability (PV) of the water-cooled laser at 8 W and the TEC-cooled laser at 12 W. (b) Variation of the power instability (PV) versus the output power of the water- and TEC-cooled lasers.
Fig. 6. Laser spectra of the TEC-cooled dual-end-pumped resonator at 3% OC transmission at different output power levels.
Fig. 7. M2 values versus the output power level for 3% OC transmission in the dual-end-pumped water-cooled resonator configuration. Inset: spatial beam characteristics and M2 values at 2 W.
Table 1. Summary of the Results Obtained with Different Er:Lu2O3 Resonator Configurations
View tableView in ArticleTable 1. Summary of the Results Obtained with Different Er:Lu2O3 Resonator Configurations
Cooling Laser Scheme Coupling Lens Group Pump Direction Polarization Output Coupler Transmission (%) Maximum Absorbed Pump Power (W) Highest Output Power (W) Slope Efficiency (%) Water Single-end-pumped scheme 30:150 Forward Non-pol. 3 27.5 6.0 24 5 32.8 6.2 21 35:200 Forward Non-pol. 3 32.0 8.1 28 5 32.0 7.2 25 Dual-end-pumped scheme 30:150:150 Forward & backward / 3 42.7 8.1 21 5 38.9 7.2 21 Forward only p-pol. 3 26.0 5.2 22 5 26.0 4.4 20 Backward only s-pol. 3 27.9 4.8 19 5 27.9 4.7 19 35:200:200 Forward & backward / 3 43.6 10.1 25 5 33.5 7.3 25 Forward only p-pol. 3 24.7 6.6 28 5 25.6 5.9 26 Backward only s-pol. 3 26.8 5.3 22 5 27.9 5.0 21 TEC Single-end-pumped scheme 35:200 Forward Non-pol. 3 41.9 10.1 27 5 41.9 9 25 Dual-end-pumped scheme 35:200:200 Forward & backward / 3 59.7 14.1 26 5 59.7 12 22
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Yangyang Liang, Tao Li, Baitao Zhang, Jingliang He, Sascha Kalusniak, Xian Zhao, Christian Kränkel, "14.1 W continuous-wave dual-end diode-pumped Er:Lu2O3 laser at 2.85 µm," Chin. Opt. Lett. 22, 011403 (2024)
Paper Information
Category: Lasers, Optical Amplifiers, and Laser Optics
Received: Sep. 5, 2023
Accepted: Sep. 18, 2023
Published Online: Jan. 9, 2024
The Author Email: Tao Li (litao@sdu.edu.cn)
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