Tu Chenghou, Huang Zhangchao, Lou Kai, Liu Hongjun, Wang Yishan, Li Yongnan, Lu Fuyun, Wang Hui-Tian
School of Physics, Nankai University, Tianjin 300071, China.
Opt Express. 2010 Nov 22;18(24):25183-91. doi: 10.1364/OE.18.025183.
We have demonstrated an ultrashort, compact green light radiation by frequency doubling of an all-fiber ytterbium-doped fiber laser source in a PPKTP waveguide fabricated by femtosecond laser pulses. Using the fabricated PPKTP waveguide crystal containing a 10 mm single grating with a period of 9.0 μm, we generate 310 mW of picosecond radiation at 532 nm for a fundamental power of 1.6W, corresponding to a conversion efficiency of 19.3%. The temperature tuning range of 8°C is achieved for a fixed fundamental wavelength of 1064 nm, the FWHM of the wavelength tuning curve is 4.2 nm at room temperature. The generated ultrashort pulses at 532 nm are of great importance and have comprehensive applications in photobiology research and high-resolution spectroscopy.
我们通过在飞秒激光脉冲制备的PPKTP波导中对全光纤掺镱光纤激光源进行倍频，演示了一种超短、紧凑的绿光辐射。使用所制备的包含周期为9.0μm的10mm单光栅的PPKTP波导晶体，在1.6W的基频功率下，我们在532nm处产生了310mW的皮秒辐射，对应转换效率为19.3%。对于1064nm的固定基频波长，实现了8°C的温度调谐范围，室温下波长调谐曲线的半高宽为4.2nm。在532nm处产生的超短脉冲非常重要，在光生物学研究和高分辨率光谱学中具有广泛应用。
