Output Characteristics of Narrow No-Gain Competition Linewidth Dual-Wavelength Laser at 912 nm and 1064 nm

Abstract

The output characteristics of a narrow linewidth, no-gain competition, dualwavelength solid-state laser using an intra-cavity pumped method are reported. This system consists of an intra-cavity pumped Nd:YVO 4 laser emitting at 1064 nm, using a 912 nm Nd:GdVO 4 laser. A Fabry-Perot etalon is used to compress the linewidth that located at the common cavity of 912 nm and 1064 nm laser. Theoretical analysis and experimental verification were carried out. When the pump power is 32.8 W, the output of 912 nm and 1064 nm theoretical value is 0.036 W and 0.046 W, and the experimental value is 0.017 W and 0.016 W, respectively. The change trend of the theoretical simulated output power value was the same as the actual measured value in the experiment. In addition to this, the experimental measurement shows when the etalon with an angle of 15˚, corresponding minimum linewidths were 0.284 nm and 0.627 nm, respectively.

Two-mirror cavity graphic analysis in resonant cavity design

“…The propagation circle diagram analysis method [1][2][3][4] can simply and clearly reveal the change process of the optical mode in the cavity, and on the premise of satisfying some special optical transformation relations, it is more convenient and easy to analyze the optical model of the resonator. Cavity pump double wavelength narrow-linewidth laser resonator contains double thermal perturbation center [5][6][7][8][9] , especially when two pieces of gain medium in a pump beam waist and quasi three level laser beam waist near cavity, due to high energy density and the pump cavity of quasi three level laser is focused on the role, the two thermal lens effect will be more obvious.…”