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Optical Engineering • Open Access

Hollow circular-truncated cone resonator and its hollow variable biconical laser beam
Author(s): Jinglun Liu; Mei Chen; Qionghua Wang; Nianchun Sun

Paper Abstract

To obtain a hollow variable biconical laser beam (HVBLB), a CO2 laser having a hollow circular-truncated cone resonator (HCTCR) is presented. This HCTCR comprises a rotationally symmetric total-reflecting concave mirror at the bottom, a rotationally symmetric part-reflecting convex mirror at the top, and a hollow circular-truncated cone discharge tube at the middle. The cross section of this generated biconical laser beam changes from annulus to circular to annulus and the size of this cross section from big to small to large as the propagation distance increases. So, a kind of laser beam with variable center intensity from zero to peak value to zero is obtained and is known as HVBLB. Due to the inclusion of part of the hollow laser beam (HLB) and solid laser beam, this HVBLB requires no additional beam-shaping element and has broad applications such as optical trapping and commercial manufacturing.

Paper Details

Date Published: 21 May 2014
PDF: 3 pages
Opt. Eng. 53(5) 056113 doi: 10.1117/1.OE.53.5.056113
Published in: Optical Engineering Volume 53, Issue 5
Show Author Affiliations
Jinglun Liu, Sichuan Univ. (China)
Mei Chen, Sichuan Univ. (China)
Qionghua Wang, Sichuan Univ. (China)
Nianchun Sun, Sichuan Univ. (China)

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