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Broadband Spectra and Efficient Laser Performance of a Disordered Nd:Sr0.7La0.3Mg0.3Al11.7O19 Crystal

by Nana Zhang 1,*, Xiaodong Xu 2,*, Yuxin Pan 2 and Jian Liu 2
1
College of Chemistry & Chemical and Environmental Engineering, Weifang University, Weifang 261061, China
2
Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(9), 1575; https://doi.org/10.3390/ma11091575
Received: 26 July 2018 / Revised: 23 August 2018 / Accepted: 27 August 2018 / Published: 1 September 2018
Here, we demonstrate the broadband spectra and efficient laser performance of a disordered Nd:Sr0.7La0.3Mg0.3Al11.7O19 (Nd:ASL) crystal. The polarized absorption and emission spectra were characterized and calculated with the Judd–Ofelt (J–O) theory, and the results show that this crystal has relatively large σ polarized absorption and emission cross sections, with peak emission cross sections of 4.5 × 10−20 cm2 at 1051 nm and an emission width of 30 nm at 1074 nm, which are favorable for pulsed lasers. The laser-diode-pumped continuous-wave (CW) and passively Q-switched lasers at 1051 nm were realized for the first time to our best knowledge. For CW laser, the maximum output power was 1.95 W with the slope efficiency of 42.6%, and for the passive Q-switching, the maximum output power was 0.73 W with the pulse width of 7.96 ns and peak power of 5.64 W. The results demonstrate that Nd:ASL crystal is a potential candidate for lasers, especially high-peak pulsed lasers such as Q-switching and mode-locking. View Full-Text
Keywords: Nd:ASL; Czochralski method; Judd–Ofelt theory; CW; passively Q-switched Nd:ASL; Czochralski method; Judd–Ofelt theory; CW; passively Q-switched
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Zhang, N.; Xu, X.; Pan, Y.; Liu, J. Broadband Spectra and Efficient Laser Performance of a Disordered Nd:Sr0.7La0.3Mg0.3Al11.7O19 Crystal. Materials 2018, 11, 1575.

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