8 September 2017 Strong focusing effect of 660 nm laser by microsized tapered glass tubes with different diameters
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Abstract
A laser with a wavelength of 660 nm was focused by microsized tapered glass tubes with different diameters of the exit. By using the 3-μm optical fiber and micrometer displacement stages, we measured the light intensity distribution around the focal spot, the focal distance, and the transmission coefficient of the light transmitted through these tubes. The focusing effect for the glass tubes with smaller outlet diameters of the exit was found to be much stronger than those with larger diameters of the exit. Furthermore, the dependence of the size and distance and the maximum intensity of the focal spot on the tubes’ diameter of exit are obtained.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Chongnan Lin, Xujia Luo, Xiaoyang Zhu, Li Zhu, Hongcheng Wang, Ao Zhang, Runyu Xu, Zheng Qu, Ximeng Chen, Weiyi Zhang, Jianxiong Shao, "Strong focusing effect of 660 nm laser by microsized tapered glass tubes with different diameters," Optical Engineering 56(9), 096101 (8 September 2017). https://doi.org/10.1117/1.OE.56.9.096101 . Submission: Received: 21 March 2017; Accepted: 1 August 2017
Received: 21 March 2017; Accepted: 1 August 2017; Published: 8 September 2017
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