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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 17 — Aug. 15, 2011
  • pp: 15879–15884

Highly efficient femtosecond pulse stretching by tailoring cavity dispersion in erbium fiber lasers with an intracavity short-pass edge filter

Nan-Kuang Chen, Feng-Zhou Liu, Hsiu-Po Chuang, Yinchieh Lai, Shang-Da Yang, Jim-Wein Lin, Shien-Kuei Liaw, Yu-Chung Chang, Chen-Bin Huang, and Sien Chi  »View Author Affiliations

Optics Express, Vol. 19, Issue 17, pp. 15879-15884 (2011)

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We demonstrate highly efficient pulse stretching in Er3+-doped femtosecond mode-locked fiber lasers by tailoring cavity dispersion using an intracavity short-pass edge filter. The cavity dispersion is preset at around zero to obtain the shortest pulsewidth. When the cutoff wavelength of the short-pass edge filter is thermo-optically tuned to overlap the constituting spectral components of mode-locked pulses, large negative waveguide dispersion is introduced by the steep cutoff slope and the total cavity dispersion is moved to normal dispersion regime to broaden the pulsewidth. The time-bandwidth product of the mode-locked pulse increases with the decreasing temperature at the optical liquid surrounding the short-pass edge filter. Pulse stretch ratio of 3.53 (623.8fs/176.8fs) can be efficiently achieved under a temperature variation of 4°C.

© 2011 OSA

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(140.4050) Lasers and laser optics : Mode-locked lasers
(230.2035) Optical devices : Dispersion compensation devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: May 31, 2011
Revised Manuscript: July 1, 2011
Manuscript Accepted: July 3, 2011
Published: August 4, 2011

Nan-Kuang Chen, Feng-Zhou Liu, Hsiu-Po Chuang, Yinchieh Lai, Shang-Da Yang, Jim-Wein Lin, Shien-Kuei Liaw, Yu-Chung Chang, Chen-Bin Huang, and Sien Chi, "Highly efficient femtosecond pulse stretching by tailoring cavity dispersion in erbium fiber lasers with an intracavity short-pass edge filter," Opt. Express 19, 15879-15884 (2011)

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