Chinese Optics Letters, Volume. 21, Issue 5, 051401(2023)
Beam quality improvement of the high-energy KTA-OPO based on a confocal unstable cavity with Gaussian reflectivity mirror
Figures & Tables(7)
Fig. 1. Schematic diagram of KTA-based OPO. ISO, isolator; HWP, half-wave plate; M1, mirror 1; GRM, Gaussian-reflectivity mirror; M2, 45° beam splitter.
Fig. 2. (a) Threshold and maximum output energy versus magnification factors; (b) output energies (signal + idler) with different magnification factors (m) versus input energy.
Fig. 3. The M2 factors versus magnification factor (m). (a) Numerical simulation; (b) experimental results.
Fig. 4. The M2 factors of signal and idler with magnification factor (m) of 1.5. (a) M2 factors of signal; (b) M2 factors of idler; insets show the beam profiles of signal and idler.
Fig. 5. Spectrum with 0.02-nm resolution. (a) Spectrum of pump light; (b) signal spectrum of OPO.
Fig. 6. (a) Pulse duration of signal; (b) pulse duration of idler.
Table 1. Summary of
M 2 and Brightness (B ) with Different Magnification Factors (m )View tableView in ArticleTable 1. Summary of
M 2 and Brightness (B ) with Different Magnification Factors (m )m 1.15 1.2 1.33 1.5 Signal Mx2/My2 9.4/9.5 9.2/8.8 8.1/7.6 5.7/5.9 B [GW/(sr·mm2)] 18.1 19.3 25.2 43.3 Idler Mx2/My2 10.2/10.3 9.7/9.8 9.1/9.0 8.4/8.1 B [GW/(sr·mm2)] 1.21 1.28 1.41 1.6
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Jun Meng, Chen Li, Zhenhua Cong, Zhigang Zhao, Shang Wang, Gaoyou Liu, Zhaojun Liu, "Beam quality improvement of the high-energy KTA-OPO based on a confocal unstable cavity with Gaussian reflectivity mirror," Chin. Opt. Lett. 21, 051401 (2023)
Paper Information
Category: Lasers, Optical Amplifiers, and Laser Optics
Received: Oct. 20, 2022
Accepted: Jan. 17, 2023
Published Online: May. 23, 2023
The Author Email: Gaoyou Liu (liugaoyou@sdu.edu.cn)
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