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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 9 — Sep. 1, 2013
  • pp: 1365–1377

Fe2+:ZnSe and graphene Q-switched singly Ho3+-doped ZBLAN fiber lasers at 3 μm

Gongwen Zhu, Xiushan Zhu, Kaushik Balakrishnan, Robert A. Norwood, and N. Peyghambarian  »View Author Affiliations

Optical Materials Express, Vol. 3, Issue 9, pp. 1365-1377 (2013)

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3 μm Ho3+-doped ZBLAN fiber lasers passively Q-switched by a Fe2+:ZnSe crystal and graphene saturable absorbers were investigated, respectively. 800 ns pulses at 2.93 µm with an energy of 460 nJ and repetition rate of 105 KHz were obtained when a Fe2+:ZnSe crystal was inserted into a free space collimating and focusing setup. A more compact and reliable Q-switched fiber laser was achieved when a graphene coated fiber mirror was butt-coupled to the angle-cleaved end of the gain fiber. 1.2 μs pulses with an energy of 1 μJ and repetition rate of 100 KHz were achieved. More than 100 mW average output power was obtained at the maximum available pump power. Our experiments demonstrate that both Fe2+:ZnSe crystal and graphene are promising saturable absorbers for pulse generation in the 3 µm wavelength region.

© 2013 OSA

OCIS Codes
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3538) Lasers and laser optics : Lasers, pulsed
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Laser Materials

Original Manuscript: June 17, 2013
Revised Manuscript: July 25, 2013
Manuscript Accepted: July 25, 2013
Published: August 14, 2013

Virtual Issues
Mid-IR Photonic Materials (2013) Optical Materials Express

Gongwen Zhu, Xiushan Zhu, Kaushik Balakrishnan, Robert A. Norwood, and N. Peyghambarian, "Fe2+:ZnSe and graphene Q-switched singly Ho3+-doped ZBLAN fiber lasers at 3 μm," Opt. Mater. Express 3, 1365-1377 (2013)

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