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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 4 — Feb. 1, 2011
  • pp: 484–491

Low-repetition-rate, high-energy, twin-pulse, passively mode locked Y b 3 + -doped fiber laser

Dongfeng Liu, Xiaojun Zhu, Chinhua Wang, Jianjun Yu, and Danfeng Hu  »View Author Affiliations


Applied Optics, Vol. 50, Issue 4, pp. 484-491 (2011)
http://dx.doi.org/10.1364/AO.50.000484


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Abstract

We report an all-normal-dispersion, low-repetition-rate, high-energy, twin-pulse, passively mode locked ytterbium-doped fiber laser. The mode-locking mechanism of the laser is based on nonlinear polarization evolution and strong pulse shaping with a cascade long-period fiber grating bandpass filtering in a highly chirped pulse. The laser generates a highly stable twin-pulse group with 248 ps and 296 ps duration simultaneously and maximum pulse energy of 26.8 nJ —each pulse at a 2.5445 MHz repetition rate. Energy quantization is observed, which demonstrates the nonparabolic nature of these pulses. The laser can also work in third-harmonic mode locking with 17.8 nJ energy (at a repetition rate of 7.65 MHz and pulse width of 780 ps ).

© 2011 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.7090) Lasers and laser optics : Ultrafast lasers
(320.5540) Ultrafast optics : Pulse shaping
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 17, 2010
Revised Manuscript: October 26, 2010
Manuscript Accepted: November 19, 2010
Published: January 27, 2011

Citation
Dongfeng Liu, Xiaojun Zhu, Chinhua Wang, Jianjun Yu, and Danfeng Hu, "Low-repetition-rate, high-energy, twin-pulse, passively mode locked Yb 3+-doped fiber laser," Appl. Opt. 50, 484-491 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-4-484

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