光子学报, 2020, 49 (3): 0314003, 网络出版: 2020-04-24
基于少模光纤被动调Q柱矢量光光纤激光器 下载: 533次
Passive Q-switched Cylindrical Vector Beam Fiber Laser Based on Few Mode Fiber
光纤激光器 被动调Q 碳纳米管 可饱和吸收体 柱矢量光 Fiber laser Passive Q-switched Carbon nanotubes Saturable absorber Cylindrical vector beam
摘要
通过单模光纤和少模光纤熔融拉锥耦合的方法制备出模式转换器,而后将一层多壁的碳纳米管薄膜作为可饱和吸收体覆盖到拉锥光纤的锥区,形成一种可饱和吸收体柱矢量光器件.结合调Q光纤激光器和模式转换器件的优势,可以简单高效地产生脉冲柱矢量光束,并得到具有峰值功率高、模式纯度高等特点的脉冲高阶模式激光输出.通过实验实现了中心波长为1 560 nm、最大单脉冲能量和最大峰值功率分别为116 nJ和57 mW的稳定调Q脉冲输出.通过调节光路中的偏振控制器,可以分别实现径向和角向偏振的调Q脉冲激光的输出.
Abstract
A mode converter is prepared through fusion taper coupling a single mode fiber and a few mode fiber, and then a multi-walled carbon nanotube film is used as a saturable absorber to cover the cone of the converter to form a saturable absorber cylindrical vector optical device. Combined the advantages of Q-switched fiber laser and mode conversion device, the pulse cylindrical vector beam can be generated simply and efficiently, and a pulsed high-order mode laser output with high peak power and high mode purity can be obtained. The experiment successfully achieves a stable Q-switched pulse output with a center wavelength of 1 560 nm, a maximum single pulse energy and a maximum peak power of 116 nJ and 57 mW, respectively. The output of the Q-switched laser with radially and azimuthally polarized beams can be achieved by adjusting the polarization controller in the optical path.
王承鑫, 陆宝乐, 罗敏, 陈浩伟, 白晋涛. 基于少模光纤被动调Q柱矢量光光纤激光器[J]. 光子学报, 2020, 49(3): 0314003. Cheng-xin WANG, Bao-le LU, Min LUO, Hao-wei CHEN, Jin-tao BAI. Passive Q-switched Cylindrical Vector Beam Fiber Laser Based on Few Mode Fiber[J]. ACTA PHOTONICA SINICA, 2020, 49(3): 0314003.