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Applied Optics

Applied Optics


  • Vol. 40, Iss. 12 — Apr. 20, 2001
  • pp: 1983–1988

Efficient double-clad thulium-doped fiber laser with a ring cavity

Jianqiu Xu, Mahendra Prabhu, Jianren Lu, Ken-ichi Ueda, and Da Xing  »View Author Affiliations

Applied Optics, Vol. 40, Issue 12, pp. 1983-1988 (2001)

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We have constructed a novel ring cavity for a double-clad thulium-doped fiber laser, by placing the fiber’s 45° angle-polished output end before the input end and relaunching the pump and the laser power into the fiber. This design can reduce reabsorption by using short fibers without loss of pump efficiency. The dependence of the laser’s performance on the fiber’s length and the output coupler’s reflectivity is investigated experimentally and theoretically. With an 80-cm-long fiber, 2.7-W single-mode continuous-wave output is generated for 11.5 W of launched pump power.

© 2001 Optical Society of America

OCIS Codes
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3510) Lasers and laser optics : Lasers, fiber

Original Manuscript: August 10, 2000
Revised Manuscript: December 13, 2000
Published: April 20, 2001

Jianqiu Xu, Mahendra Prabhu, Jianren Lu, Ken-ichi Ueda, and Da Xing, "Efficient double-clad thulium-doped fiber laser with a ring cavity," Appl. Opt. 40, 1983-1988 (2001)

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