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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 19 — Sep. 19, 2005
  • pp: 7424–7431

230-kW peak power femtosecond pulses from a high power tunable source based on amplification in Tm-doped fiber

G. Imeshev and M. E. Fermann  »View Author Affiliations

Optics Express, Vol. 13, Issue 19, pp. 7424-7431 (2005)

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We report for the first time an all-fiber laser system that generates tunable Watt-level femtosecond pulses at around 2 μm without an external pulse compressor. The system is based on amplification of a Raman shifted Er-doped fiber laser in a Tm-doped 25-μm-core fiber. We obtain 108-fs pulses at 1980 nm with an average power of 3.1 W and a pulse energy of 31 nJ. The peak power at the output of the amplifier is estimated as ~230 kW, which to the best of our knowledge is the highest peak power obtained from a femtosecond or a few-picosecond amplifier based on any doped fiber. The amplified output is frequency-doubled to produce 78-fs pulses at 990 nm with an average power of 1.5 W and a pulse energy of 15 nJ. We demonstrate broad wavelength tunability around 2 μm as well as around 1 μm.

© 2005 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(320.5520) Ultrafast optics : Pulse compression
(320.7090) Ultrafast optics : Ultrafast lasers

ToC Category:
Research Papers

Original Manuscript: July 18, 2005
Revised Manuscript: August 31, 2005
Published: September 19, 2005

G. Imeshev and M. Fermann, "230-kW peak power femtosecond pulses from a high power tunable source based on amplification in Tm-doped fiber," Opt. Express 13, 7424-7431 (2005)

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