Growth,Spectroscopic Properties and Laser Performance of Nd∶ASL Single Crystal Fibers
Nd3+-doped Sr0.7La0.3Mg0.3Al11.7O19(Nd∶ASL)single crystal fibers with different Nd3+concentration were successfully grown by the micro-pulling-down(μ-PD)method.The crystal structure,polarized spectroscopic properties and continuous wave laser performance were studied.The Judd-Ofelt parameters Ω2,Ω4 and Ω6 are obtained to be 1.093×10-20,2.285×10-20 and 2.117×10-20 cm2,respectively.The fluorescence lifetime of 0.5％,1.0％,3.0％and 5.0％Nd∶ASL single crystal fibers are 375,398,384 and 363 μs,respectively.A continuous wave laser is obtained by pumping with a commercial laser diode of 800 nm emission wavelength.The maximum output power is 1.08 W at 1 055 nm with a slope efficiency of 18.5％.All the results indicate that Nd3+-doped ASL single crystal fiber grown by the μ-PD method has potential as a laser gain medium for laser system.
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