论文部分内容阅读
报道了一种输出波长在1270nm的混合级联掺磷拉曼激光器。该激光器分别利用掺磷光纤中频移为1330cm-1和197cm-1的拉曼散射,使1064nm激光两次频移,实现了1270nm激光输出。对1270nm的二级拉曼光设计了对称和非对称两种腔结构,并进行了对比实验。结果表明,非对称结构可有效地避免腔内激光从高反端的泄漏,降低激光阈值,提高激光器转换效率。非对称结构激光器的振荡阈值为3.70 W,抽运功率为8.66 W时,激光器最大输出总功率为2.38W,从1064nm到1270nm的激光转换效率为22%。
A hybrid cascade phosphor-doped Raman laser with a wavelength of 1270nm was reported. The laser uses the Raman scattering of 1330cm-1 and 197cm-1, respectively, in the doped phosphor fiber to shift the frequency of the 1064nm laser twice to achieve a 1270nm laser output. Two types of cavity structures, symmetrical and asymmetric, were designed for the 1270nm second-order Raman light and a comparative experiment was carried out. The results show that the asymmetric structure can effectively avoid the laser cavity leakage from the high anti-end, reduce the laser threshold and improve the laser conversion efficiency. The asymmetry laser has an oscillation threshold of 3.70 W and a maximum pumping power of 2.38 W at a pumping power of 8.66 W. The laser conversion efficiency from 1064 nm to 1270 nm is 22%.