排序方式: 共有17条查询结果,搜索用时 0 毫秒
1.
2.
基于阵列永磁体的特点以及光隔离器对磁场的需求设计了两种适用于高功率隔离器的永磁系统,分析了其磁场分布、磁场非均匀性对隔离度的影响,研究了磁体装配误差对磁场的影响。研究结果表明:通过引入斜向磁化永磁体,选择合适的磁化角度和磁体长度,可以提高永磁体的磁场强度,大幅度减小旋转器所需磁光晶体长度;受磁场非均匀性影响的隔离度与磁光晶体的孔径、长度以及入射激光的光斑半径有关,当晶体长度一定时,减小晶体半径和入射光的半径可以显著提高隔离度。在入射光半径为1.5 mm、磁光晶体半径5 mm时,对应的隔离度分别为105.8 dB和45.4 dB。 相似文献
3.
4.
双二色镜腔的国产掺Yb3+双包层光纤激光器 总被引:2,自引:0,他引:2
国产双包层光纤对泵浦光不能实现有效吸收,从而导致剩余泵光过多的现象,本文采用了双二色镜的腔结构,研究了国产D型内包层掺Yb3 双包层光纤激光器的输出特性,得到了无剩余泵光的激光脉冲输出,中心波长为1.076μm,平均功率为604 nw. 相似文献
5.
6.
We demonstrate a 1550-nm narrow-linewidth fiber ring laser with stable single polarization by using single-mode Er-doped fiber as active fiber and saturable absorber. A polarization-maintaining circulator is used to acquire single-polarization laser light with the degree of polarization of 99.8%--99.9%. The linewidth measured using a delayed self-heterodyne method is less than 0.5 kHz. Frequency of the fiber laser can be modulated by driving the waveguide phase modulator with proper voltage. A Mach-Zehnder interferometer with the optical path difference between two arms of about 36 km is used to study the long-distance coherent detection of the fiber laser for frequency-modulated continuous-wave application. 相似文献
7.
本介绍了一种国产LD泵浦的高功率掺YB^3 双包层光纤激光器,泵浦功率2.15W时,得到了54W的功率输出,斜率效率达到86.1%.并对光纤激光器的光谱特性、时域特性进行了初步的研究和分析. 相似文献
8.
本文研究了包层泵浦全光纤调Q激光器。掺Yb光纤为增益介质,光纤光栅和光纤的垂直端面作为腔镜,利用光纤中的受激布里渊散射和光纤干涉环实现了较稳定的自调Q脉冲输出。在连续泵浦方式下得到了脉宽3.6ns、周期约25μs、峰值功率600W的光脉冲。 相似文献
9.
In this paper, the generation of dual-wavelength stable nanosecond pulses by a laser diode pumped Yb-doped double-clad fiber laser is presented. In the experiment, the fiber laser with two-mirror cavity is approved which operates in a self-Q-switching regime. The Q-switching mechanism is based on stimulated Brillouin scattering (SBS). When the pump power achieves the SBS threshold, the fiber laser changes from the start resonator to the SBS resonator. With different reflectivities of the second mirror, stable dual-wavelength pulses with the pulse width range from 10 ns to less than 2 ns are obtained. The result was explained theoretically by birefringency (including stochastic birefringency and bend birefringency). 相似文献
10.