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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 13 — Jul. 1, 2013
  • pp: 16035–16042

Generation of azimuthally and radially polarized off-axis beams with an intracavity large-apex-angle axicon

Ken-Chia Chang, Tyson Lin, and Ming-Dar Wei  »View Author Affiliations


Optics Express, Vol. 21, Issue 13, pp. 16035-16042 (2013)
http://dx.doi.org/10.1364/OE.21.016035


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Abstract

Depending on cavity configuration, a c-cut Nd:YVO4 laser by using a large-apex-angle axicon can execute azimuthally and radially polarized operations. A large-apex-angle axicon dominates and stabilizes the generation of the pattern, and expands the difference between the ordinary and extraordinary rays to generate off-axis cylindrical vector beams. When the cavity length is properly adjusted, the polarization of off-axis laser beams can exhibit a transition from azimuthal to radial polarization. The degree of polarizations can be up to 95.4% ± 2.6% and 94% ± 3.7% for azimuthally and radially polarized beams, respectively; and the slope efficiencies are approximately 20.5% for both polarized operations. Using two-pass-mode ray tracing, the ray generating mechanisms and divergent angles of their patterns were analyzed.

© 2013 OSA

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 2, 2013
Revised Manuscript: June 18, 2013
Manuscript Accepted: June 21, 2013
Published: June 27, 2013

Citation
Ken-Chia Chang, Tyson Lin, and Ming-Dar Wei, "Generation of azimuthally and radially polarized off-axis beams with an intracavity large-apex-angle axicon," Opt. Express 21, 16035-16042 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-13-16035


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