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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 16 — Aug. 1, 2011
  • pp: 14883–14891

Gain-switched CW fiber laser for improved supercontinuum generation in a PCF

C. Larsen, D. Noordegraaf, P. M. W. Skovgaard, K. P. Hansen, K. E. Mattsson, and O. Bang  »View Author Affiliations


Optics Express, Vol. 19, Issue 16, pp. 14883-14891 (2011)
http://dx.doi.org/10.1364/OE.19.014883


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Abstract

We demonstrate supercontinuum generation in a PCF pumped by a gain-switched high-power continuous wave (CW) fiber laser. The pulses generated by gain-switching have a peak power of more than 700 W, a duration around 200 ns, and a repetition rate of 200 kHz giving a high average power of almost 30 W. By coupling such a pulse train into a commercial nonlinear photonic crystal fiber, a supercontinuum is generated with a spectrum spanning from 500 to 2250 nm, a total output power of 12 W, and an infrared flatness of 6 dB over a bandwidth of more than 1000 nm with a power density above 5 dBm/nm (3 mW/nm). This is considerably broader than when operating the same system under CW conditions. The presented approach is attractive due to the high power, power scalability, and reduced system complexity compared to picosecond-pumped supercontinuum sources.

© 2011 OSA

OCIS Codes
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(140.3510) Lasers and laser optics : Lasers, fiber
(140.5560) Lasers and laser optics : Pumping
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 7, 2011
Revised Manuscript: July 6, 2011
Manuscript Accepted: July 6, 2011
Published: July 18, 2011

Citation
C. Larsen, D. Noordegraaf, P. M. W. Skovgaard, K. P. Hansen, K. E. Mattsson, and O. Bang, "Gain-switched CW fiber laser for improved supercontinuum generation in a PCF," Opt. Express 19, 14883-14891 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-16-14883


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