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LI Zhaohui 《Chinese Journal of Lasers》2002,11(5):321-323324
A novel Yb3+-doped fiber ring cavity laser pumped by a 977 nm laser diode is presented with its output laser wavelength of 1060 nm. Based on a fiber Bragg grating (FBG), the laser exhibits 0.20 nm line-width, 7.5 mW laser output power, 40 dB signal-to-noise ratio (SNR) and 66% slope efficiency.This paper proposed a ray-tracing model for the Martinez stretcher, derived the calculation formulae for the stretcher of a grating-spherical mirror system and discussed the error for the total dispersion resulted from the spatial dispersion. The calculated results show that the error could be ignored for the beam returned to the stretcher for the second pass in the wavelength range of 750 nm and 850 nm. 相似文献
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研究了一种单双波长可切换的线偏振掺镱双包层光纤激光器结构,腔内插入可以绕光轴方向旋转的立方体偏振分束器(PBS)进行偏振控制,实现单双波长的转换。激光谐振腔由高反射率的双色镜和较低反射率(10.2%)的保偏光纤布拉格光栅(PM-FBG)构成;由于保偏光纤光栅的偏振选择反馈作用增强了偏振烧孔效应,通过调节谐振腔内偏振分束器的旋转角度实现了激光的单双波长之间的切换。利用琼斯矩阵理论分析了偏振态与旋转角度的关系,其结果与实验结果吻合。实验中输出激光的双波长为1070.08nm和1070.39nm、功率为1W、激光信噪比为48dB、斜率效率为34%、3dB带宽为0.02nm。利用格兰汤姆孙棱镜对该激光的偏振特性进行了研究:单波长运转时为线偏振激光,偏振度达13.37dB;双波长运转时为正交偏振激光。 相似文献
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大模场面积掺镱双包层光纤研究 总被引:1,自引:1,他引:0
采用改进的化学汽相沉积工艺,沉积了光纤阻挡层和疏松层.结合溶液掺杂技术,研究了疏松层沉积温度、镱铝共掺工艺条件对掺镱浓度的影响,研究了大模场面积纤芯的制备工艺,实现了高浓度大模场面积掺镱双包层光纤的研制.测量并分析了光纤的光学性能参数及其激光特性,光纤芯径达到30 μm,纤芯摻镱浓度提高到4 000 ppm以上,芯数值孔径降至0.07,光纤的模场面积从113 μm2 提高到1 256 μm2,光纤的非线性效应阈值功率由12 W提高到大于128 W. 相似文献
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A novel Yb3+-doped fiber ring cavity laser pumped by a 977 nm laser diode is presented with its output laser wavelength of 1060 nm. Based on a fiber Bragg grating (FBG), the laser exhibits 0.20 nm line-width, 7.5 mW laser output power, 40 dB signal-to-noise ratio (SNR) and 66% slope efficiency. 相似文献