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Materials 2018, 11(9), 1575;

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

College of Chemistry & Chemical and Environmental Engineering, Weifang University, Weifang 261061, China
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.
Received: 26 July 2018 / Revised: 23 August 2018 / Accepted: 27 August 2018 / Published: 1 September 2018
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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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