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We report an efficient continuous-wave self-Raman laser at 1176 nm based on a 20-mm-long composite YVO_4/Nd:YVO_4/YVO_4 crystal and pumped by a wavelength-locked 878.9 nm diode laser.A maximum output power of 5.3 W is achieved at a pump power of 26 W,corresponding to an optical conversion efficiency of 20%and a slope efficiency of 21%.The Raman threshold for the diode pump power was only 0.92 W.The results reveal that in-band pumping by a wavelength-locked diode laser significantly enhances output power and efficiency of self-Raman lasers by virtue of improved pump absorption and relieved thermal loading.
We report an efficient continuous-wave self-Raman laser at 1176 nm based on a 20-mm-long composite YVO_4 / Nd: YVO_4 / YVO_4 crystal and pumped by a wavelength-locked 878.9 nm diode laser. A maximum output power of 5.3 W The achieved power at 26 W, corresponding to an optical conversion efficiency of 20% and a slope efficiency of 21%. The Raman threshold for the diode pump power was only 0.92 W. The results reveal that in-band pumping by a wavelength-locked diode laser significant enhances output power and efficiency of self-Raman lasers by virtue of improved pump absorption and relieved thermal loading.