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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 5 — Feb. 10, 2014
  • pp: 892–897

Self-mode-locked 2 μm Tm3+-doped double-clad fiber laser with a simple linear cavity

Chun Liu, Zhengqian Luo, Yizhong Huang, Biao Qu, Huihui Cheng, Ying Wang, Duanduan Wu, Huiying Xu, and Zhiping Cai  »View Author Affiliations

Applied Optics, Vol. 53, Issue 5, pp. 892-897 (2014)

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We demonstrate the self-mode-locking operation of a thulium (Tm)-doped fiber laser (TDFL) with a simple linear cavity. Since the laser cavity does not include any specific mode-locker, we experimentally investigate and analyze the self-mode-locking mechanism. The mode-locking operation is attributed to the combination of the self-phase modulation effect and the weak saturable absorption of the high-concentration Tm-doped fiber. The mode-locked TDFL operates at a central wavelength of 1985.5 nm with the 3 dB spectral linewidth of 0.18 nm. The self-mode-locking generates a large pulse energy of 32.7 nJ with a pulsed repetition rate of 2.05 MHz and is stable with a radio-frequency signal-to-noise ratio of more than 54 dB. To the best of our knowledge, it is the first demonstration of a 2 μm Tm-doped fiber laser mode-locked by such technique.

© 2014 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.4050) Lasers and laser optics : Mode-locked lasers
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 29, 2013
Revised Manuscript: December 31, 2013
Manuscript Accepted: January 1, 2014
Published: February 6, 2014

Chun Liu, Zhengqian Luo, Yizhong Huang, Biao Qu, Huihui Cheng, Ying Wang, Duanduan Wu, Huiying Xu, and Zhiping Cai, "Self-mode-locked 2 μm Tm3+-doped double-clad fiber laser with a simple linear cavity," Appl. Opt. 53, 892-897 (2014)

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