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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 10 — Apr. 1, 2014
  • pp: 2213–2219

Beam shaping characteristics of an unstable-waveguide hybrid resonator

Longsheng Xiao, Yingxiong Qin, Xiahui Tang, Chenhao Wan, Gen Li, and Lijing Zhong  »View Author Affiliations

Applied Optics, Vol. 53, Issue 10, pp. 2213-2219 (2014)

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The unstable-waveguide hybrid resonator emits a rectangular, simple astigmatic beam with a large number of high-spatial-frequency oscillations in the unstable direction. To equalize the beam quality, in this paper, a beam shaping system with a spatial filter for the hybrid resonator was investigated by numerical simulation and experimental method. The high-frequency components and fundamental mode of the output beam of the hybrid resonator in the unstable direction are separated by a focus lens. The high-frequency components of the beam are eliminated by the following spatial filter. A nearly Gaussian-shaped beam with approximately equal beam propagation factor M2 in the two orthogonal directions was obtained. The effects of the width of the spatial filter on the beam quality, power loss, and intensity distribution of the shaped beam were investigated. The M2 factor in the unstable direction is changed from 1.6 to 1.1 by optimum design. The power loss is only 9.5%. The simulation results are in good agreement with the experimental results.

© 2014 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 14, 2014
Revised Manuscript: February 20, 2014
Manuscript Accepted: February 20, 2014
Published: March 31, 2014

Longsheng Xiao, Yingxiong Qin, Xiahui Tang, Chenhao Wan, Gen Li, and Lijing Zhong, "Beam shaping characteristics of an unstable-waveguide hybrid resonator," Appl. Opt. 53, 2213-2219 (2014)

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