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Device and method for performing overall frequency stabilization of femtosecond laser optical comb by using optical modes directly extracted from optical comb

  • US 10,141,713 B2
  • Filed: 08/19/2015
  • Issued: 11/27/2018
  • Est. Priority Date: 07/15/2015
  • Status: Active Grant
First Claim
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1. A device for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb, comprising:

  • a femtosecond laser light source including a length adjusting element and one of a pumping laser and an acousto-optic modulator and outputting the femtosecond laser optical comb;

    an optical mode extracting unit extracting a first optical mode and a second optical mode having different frequencies from the femtosecond laser optical comb;

    an injection locking unit injecting the first optical mode to a first slave laser to generate a first cw light and injecting the second optical mode to a second slave laser to generate a second cw light; and

    a controlling unit including a high-finesse cavity, generating a first optical comb control signal based on the first cw light and a resonance frequency of the high-finesse cavity to control the length adjusting element, and generating a second optical comb control signal based on the second cw light and a resonance frequency of the high-finesse cavity to control the pumping laser or the acousto-optic modulator included in the femtosecond laser light source.

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