A Tunable CW Orange Laser Based on a Cascaded MgO:PPLN Single-Pass Sum-Frequency Generation Module

作者：Choge, Dismas K.; Chen, Huai-Xi; Tian, Bao-Lu; Xu, Yi-Bin; Li, Guang-Wei; Liang, Wan-Guo^*

来源：Applied Sciences-Basel, 2018, 8(3): 439.

DOI：10.3390/app8030439

• lithium niobate
• sum frequency generation
• quasi phase-matching
• lasers

We report an all-solid-state continuous wave (CW) tunable orange laser based on cascaded single-pass sum-frequency generation with fundamental wavelengths at 1545.7 and 975.2 nm using two quasi-phase-matched (QPM) MgO-doped periodically poled lithium niobate (MgO: PPLN) crystals. Up to 10 mW of orange laser is generated in the cascaded module corresponding to a 10.4%/W nonlinear conversion efficiency. The orange output showed a temperature tuning rate of similar to 0.05 nm/degrees C, and the beam quality (M-2) value of the orange laser was about 2.0. We use this technique to combine the high efficiency offered by uniformly poled crystals and the broad input wavelength acceptance characteristic of step-chirped structures.

• 出版日期2018-3
• 单位中国科学院福建物质结构研究所; 中国科学院大学