【摘 要】
：
The output characteristics of a linear cavity Yb-doped double-clad fiber (DCF) laser, including the effects of fiber length, fiber loss, and output mirror reflectivity on laser output power and threshold pump power have been studied theoretically andexper
【机 构】
：
ChangchunInstituteofOptics,FineMechanicsandPhysics,ChineseAcademyofSciences,Changchun130022
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
The output characteristics of a linear cavity Yb-doped double-clad fiber (DCF) laser, including the effects of fiber length, fiber loss, and output mirror reflectivity on laser output power and threshold pump power have been studied theoretically andexperimentally. In this paper, the linear cavity of double-clad fiber laser (DCFL) was composed of a pair of fiber Bragg gratings, while the facet of fiber was anti-reflection (AR) coated at 1070nm to erase the Fresnel reflection. Analysis showed that the laser output increases as the reflectivity of the fiber Bragg grating used as the output mirror decreases. At last, under the pump power of 14.4 W, single-mode laser output at 1070 nm was up to 10.8 W, with slope efficiency of 75%.
其他文献
The joint transfer of frequency and one pulse-per-second time signals based on dense wavelength division multiplexing technology is demonstrated over a compensated cascaded fiber link of 230 km, consisting of two stages of fiber links with lengths of 150
We experimentally demonstrate the ultra-high range resolution of a photonics-based microwave radar using a high repetition rate actively mode-locked laser (AMLL). The transmitted signal and sampling clock in the radar originate from the same AMLL to achie
为了解决多投影机拼接融合显示系统中亮度分布不均匀及不同视角下的亮度差异问题,提出了一种多视角投影-摄像机系统的非线性最优化颜色校正方法,通过在多个位置放置摄像机进行多角度的观察,并对所有观察结果进行统一的优化处理,实现在各个方向上都能够满足要求的亮度调整方案。针对重叠区域高亮现象及重叠方向和形状的任意性问题,采用双三角函数法计算得到投影机的衰减矩阵,实现亮度融合。以双通道投影系统为实验平台验证了算
在模糊集合论(FS)和广义模糊集合论(GFS)的基础上,构造出用于模糊增强图像区域对比度的新型线性广义模糊算子(LGFO),理论分析并验证了其性质。提出了一种自适应双线性广义模糊增强算法用于提取图像边缘轮廓,该算法利用线性广义隶属度变换函数与LGFO,实现了灰度图像空间与广义模糊空间的相互转换,空间转换过程中对线性广义模糊隶属空间实施了线性广义模糊增强处理,最终在灰度图像空间中使用"MIN"算子提
提出了一种利用一维平面透射光栅作为敏感器件的滚转角测量新方法。利用聚焦透镜及光电位置探测器组成接收测量单元, 避免了直线度误差带来的影响; 利用光栅的±1级衍射光束构成双光路差动测量, 基本避免了俯仰、偏摆角的串扰, 实现了误差分离, 同时增强了抗干扰能力。通过详细的理论分析, 论证了方案的可行性, 并在此基础上通过实验得到了定标曲线, 其线性相关度为1, 滚转角测量的角度分辨率可以达到0.6″。测量方法简单灵活, 仅需更换不同线数的光栅便可满足不同测量精度的要求。
A novel and compact near-infrared (NIR) Raman system is developed using 785-nm diode laser, volume-phase technology (VPT) holographic system, and NIR intensified charge-coupled device (CCD). Signal-to-noise ratio (SNR) and resolution are improved compared
We demonstrate laser-ranging results for non-cooperative targets at ranges of 237 m and 19 km using superconducting nanowire single-photon detectors (SSPD). We upgrade the kilohertz rate laser-ranging system with a newly developed SSPD module, and the equ
Up-convertion (UC) perovskite Er3 -doped PbTiO3 (Er-PTO) nanoparticles with green and red emissions were synthesized via the hydrothermal method. The UC properties were manipulated by adjusting the concentration of Er3 io