Device and method for performing overall frequency stabilization of femtosecond laser optical comb by using optical modes directly extracted from optical comb
First Claim
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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Abstract
The present invention relates to a device and a method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb, and more particularly, to a device and a method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb capable of stabilizing an overall range of frequencies of the femtosecond laser optical comb by using optical modes directly extracted from the optical comb and generating a cw laser and pulse having an excellent frequency stability and linewidth from the stabilized optical comb.
8 Citations
15 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for performing overall frequency stabilization of a femtosecond laser optical comb by using optical modes directly extracted from the optical comb, comprising:
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(a) a step of outputting the femtosecond laser optical comb from a femtosecond laser light source including a length adjusting element adjusting a frequency of the optical comb by adjusting an actual length of the femtosecond laser light source and one of an acousto-optic modulator and a pumping laser adjusting a frequency of the optical comb by adjusting an optical path length of the femtosecond laser light source; (b) a step of extracting a first optical mode and a second optical mode having different optical frequencies from the optical comb; (c) a step of 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; (d) a step of generating two optical comb control signals for controlling the femtosecond laser optical comb from the first cw light and the second cw light by using a high-finesse cavity; and (e) a step of stabilizing the overall femtosecond laser optical comb by controlling the length adjusting element and one of the pumping laser and the acousto-optic modulator on the basis of the two optical comb control signals. - View Dependent Claims (14, 15)
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Specification