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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 16 — Jun. 1, 2007
  • pp: 3304–3310

Birefringence-induced bifocusing for selection of radially or azimuthally polarized laser modes

Galina Machavariani, Yaakov Lumer, Inon Moshe, Avi Meir, Steven Jackel, and Nir Davidson  »View Author Affiliations


Applied Optics, Vol. 46, Issue 16, pp. 3304-3310 (2007)
http://dx.doi.org/10.1364/AO.46.003304


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Abstract

We develop a round-trip matrix diagonalization method for quantitative description of selection of radially or azimuthally polarized beams by birefringence-induced bifocusing in a simple laser resonator. We employ different focusing between radially and tangentially polarized light in thermally stressed laser rods to obtain low-loss stable oscillation in a radially polarized Laguerre–Gaussian, LG ( 0 , 1 ) * , mode. We derive a free-space propagator for the radially and azimuthally polarized LG ( 0 , 1 ) * modes and explain basic principles of mode selection by use of a round-trip matrix diagonalization method. Within this method we calculate round-trip diffraction losses and intensity distributions for the lowest-loss transverse modes. We show that, for the considered laser configuration, the round-trip loss obtained for the radially polarized LG ( 0 , 1 ) * mode is significantly smaller than that of the azimuthally polarized mode. Our experimental results, obtained with a diode side-pumped Nd:YAG rod in a flat–convex resonator, confirm the theoretical predictions. We achieved a pure radially polarized LG ( 0 , 1 ) * beam with M 2 = 2.5 and tens of watts of output power.

© 2007 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3410) Lasers and laser optics : Laser resonators
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 19, 2006
Manuscript Accepted: February 5, 2007
Published: May 15, 2007

Citation
Galina Machavariani, Yaakov Lumer, Inon Moshe, Avi Meir, Steven Jackel, and Nir Davidson, "Birefringence-induced bifocusing for selection of radially or azimuthally polarized laser modes," Appl. Opt. 46, 3304-3310 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-16-3304


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