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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 33, Iss. 22 — Nov. 15, 2008
  • pp: 2686–2688

Radially polarized and pulsed output from passively Q-switched Nd:YAG ceramic microchip laser

Jian-lang Li, Ken-ichi Ueda, Mitsuru Musha, Lan-xiang Zhong, and Akira Shirakawa  »View Author Affiliations


Optics Letters, Vol. 33, Issue 22, pp. 2686-2688 (2008)
http://dx.doi.org/10.1364/OL.33.002686


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Abstract

For the first time, to the best of our knowledge, a radially polarized laser pulse was produced from a passively Q-switched Nd:YAG ceramic microchip laser with a piece of Cr 4 + : YAG crystal as the saturable absorber and multilayer concentric subwavelength grating as the polarization-selective output coupler. The averaged laser power reached 450 mW with a slope efficiency of 30.2%. The laser pulse had a maximum peak power of 759 W , a minimum pulse duration of 86 ns , and a 6.7 kHz repetition rate at 3.7 W absorbed pump power. The polarization degree of the radially polarized pulse was measured to be as high as 97.4%. Such a radially polarized laser pulse with a high peak power and a short width is important to numerous applications such as metal cutting.

© 2008 Optical Society of America

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3580) Lasers and laser optics : Lasers, solid-state
(230.5440) Optical devices : Polarization-selective devices
(140.3538) Lasers and laser optics : Lasers, pulsed

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: August 26, 2008
Manuscript Accepted: September 24, 2008
Published: November 14, 2008

Citation
Jian-lang Li, Ken-ichi Ueda, Mitsuru Musha, Lan-xiang Zhong, and Akira Shirakawa, "Radially polarized and pulsed output from passively Q-switched Nd:YAG ceramic microchip laser," Opt. Lett. 33, 2686-2688 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-22-2686


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