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All-Normal-Dispersion Femtosecond Fiber Laser

  • US 20100220751A1
  • Filed: 09/18/2007
  • Published: 09/02/2010
  • Est. Priority Date: 09/18/2006
  • Status: Active Grant
First Claim
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1. A fiber laser for generating femtosecond duration pulses comprises a gain fiber to increase the energy of a pulse in a laser cavity, said cavity also including one or more dispersion elements, each of which provides only normal group velocity dispersion, said laser cavity at least including:

  • a chirping element for broadening a multiple frequency component pulse in said cavity and spreading said frequency components in said pulse apart over time; and

    a spectral bandpass filter for passing a portion of said chirped pulse including only frequency components in a narrow range around a selected center frequency, thereby producing self-amplitude modulation of said pulse.

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