Chinese Optics Letters, Volume. 23, Issue 7, 071403(2025)
Spectroscopic characterization and efficient tunable lasers of Ho:BaF2 single crystals
Fig. 1. Photographs of (a) the as-grown Ho:BaF2 crystal and (b) processed and polished Ho:BaF2 crystals.
Fig. 2. Schematic of the Ho:BaF2 crystal laser. M1, M2, folding mirrors; M3, high reflective mirror; LF, Lyot filter inserted at Brewster’s angle; OC, output coupler.
Fig. 3. Room temperature XRD pattern of the powdered Ho:BaF2 crystal.
Fig. 4. Room temperature absorption cross-section of the Ho:BaF2 crystal.
Fig. 5. (a) Room temperature emission cross-section of the Ho:BaF2 crystal and (b) fluorescence decay curve of the 5I7 level in the Ho:BaF2 crystal.
Fig. 6. Relationship between the quality factor Q and the wavelength for Ho:BaF2 and other Ho3+ ion-doped gain media.
Fig. 8. (a) Relationship between output power and absorbed pump power at different Toc and (b) laser spectra with Toc = 5% of the Ho:BaF2 crystal.
Fig. 9. Wavelength tuning curve of the Ho:BaF2 crystal with Toc = 0.5% and Toc = 1%.
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Xinyu Qian, Ning Zhang, Wudi Wang, Qingsong Song, Yanyan Xue, Song Wang, Feng Wu, Chenbo Zhang, Huili Tang, Xiaodong Xu, Yongguang Zhao, Qingguo Wang, Jun Xu, "Spectroscopic characterization and efficient tunable lasers of Ho:BaF2 single crystals," Chin. Opt. Lett. 23, 071403 (2025)
Category: Lasers, Optical Amplifiers, and Laser Optics
Received: Jan. 2, 2025
Accepted: Feb. 19, 2025
Published Online: Jun. 11, 2025
The Author Email: Yanyan Xue (xueyanyan@mail.sic.ac.cn), Qingguo Wang (qgwang@tongji.edu.cn)