Author Affiliations
Abstract
1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100049, China
3 Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
We experimentally compare the output abilities of lightly and heavily doped Ti:Sapphire (Ti:S) amplifiers with diameters as large as 150 mm. Although a lightly doped Ti:S is more favorable to overcome parasitic lasing (PL) and transverse amplified spontaneous emission (TASE), the self-phase-modulation (SPM) effect becomes more pronounced when a longer crystal is used. Recompression of the amplified, stretched pulses can be seriously affected by the SPM effect. We then propose a temporal multi-pulse pump scheme to suppress PL and TASE in a thin, heavily doped Ti:S crystal. This novel temporal multi-pulse pump technique can find potential applications in 10 PW chirped-pulse amplification laser systems.
140.3280 Laser amplifiers 140.3590 Lasers, titanium 140.5560 Pumping Chinese Optics Letters
2017, 15(9): 091401
燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室, 河北 秦皇岛 066004
提出一种液晶填充碲酸盐玻璃的柚子型光子晶体光纤偏振旋转器, 利用全矢量有限元法, 对液晶填充碲酸盐玻璃的柚子型光子晶体光纤的偏振旋转特性进行数值模拟, 并分析了光纤结构参数、环境温度、工作波长等对光纤偏振旋转特性的影响.研究结果表明: 此种偏振旋转器具有较高的旋转效率、较低的工作串扰和较短的旋转长度, 在工作波长为1.55 μm、偏振角度为45°时, 其值分别达到99.947%、－32.84 dB和197 μm; 另外, 随着光纤薄壁厚度的增加, 旋转长度随之升高, 随着工作波长的变大, 旋转长度随之降低, 随着温度的增加, 旋转长度随之升高.这种新型的光子晶体光纤为偏振旋转器的研发提供了参考.
光纤光学 光子晶体光纤 偏振旋转器 液晶 碲酸盐玻璃 Fiber optics Photonic crystal fiber Polarization rotator Liquid crystal Tellurite glass 光子学报
2016, 45(11): 1106003
