High-quality and controllable hollow beam generation by a liquid-core optical fiber
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- 作者：Chunyuan Mu ; Xiaobo Hu ; Wei Gao ; wei_g@163.com" class="auth_mail" title="E-mail the corresponding author ; Peijing Sun ; Liuyang Zhang ; Hongying Zhang ; Shaozhi Pu
- 关键词：Hollow beam ; Liquid-core optical fiber ; Beam quality ; Controllable beam parameter
- 刊名：Optik - International Journal for Light and Electron Optics
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：126
- 期：24
- 页码：5559-5562
- 全文大小：1313 K
文摘
We present the generation of high-quality and beam parameter controllable hollow beams with a liquid-core optical fiber (LCOF) filled with CS2 by adjusting off-axis orientation and LCOF structure. The dependences of the dark spot size (DSS), ring beam width (RBW) and transverse field intensity distribution of the hollow beam on the incidence angle of laser beam, the length and core diameter of the LCOF are investigated experimentally, and analyzed theoretically by using Zemax simulation. The results show that the quality of the hollow beam is related to the times of total internal reflection of skew rays in the fiber core; the DSS and RBW are closely controlled by the incidence angle and core diameter. High-quality thin-ring hollow beam is achieved experimentally by the LCOF of the core diameter of 100 μm and the length of 1 m with the incidence angle of less than 10°. The hollow beam generated has high stability, and is weakly dependent on the bending of the LCOF.