In-line, high energy fiber chirped pulse amplification system
First Claim
1. A chirped pulse amplification system comprising:
- a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100 ps;
at least one fiber amplifier following said pulse stretcher system; and
a pulse compressor configured to compress said stretched pulses by more than a factor of 50 to produce compressed pulses having a bandwidth greater than 1 nm,wherein the pulse stretcher system is configured to produce stretched pulses having a group delay ripple less than about 10 ps.
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Abstract
By writing non-linear chirp into fiber Bragg gratings, greater control over dispersion compensation in chirped pulse amplification (CPA) systems is obtained, such that, for example, the dispersion profile of the fiber Bragg grating and a bulk compressor may be matched. An iterative method of writing the fiber grating can reduce the group delay ripple to very low levels; and adaptive control of the fiber grating dispersion profile can further reduce these levels, while in addition offering greater acceptable yield in the manufacture of such gratings. Fiber Bragg gratings may be designed so as to provide customized pulse shapes optimized for various end uses, such as micromachining, for example, and may also be used to counteract gain-narrowing in a downstream amplifier.
53 Citations
40 Claims
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1. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100 ps; at least one fiber amplifier following said pulse stretcher system; and a pulse compressor configured to compress said stretched pulses by more than a factor of 50 to produce compressed pulses having a bandwidth greater than 1 nm, wherein the pulse stretcher system is configured to produce stretched pulses having a group delay ripple less than about 10 ps. - View Dependent Claims (11, 12, 13)
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2. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100ps; at least one fiber amplifier following said pulse stretcher system; and a pulse compressor configured to compress said stretched pulses by more than a factor of 50 to produce compressed pulses having a bandwidth greater than 1 nm, wherein the pulse stretcher system is configured to produce stretched pulses having a group delay ripple less than about 2 ps. - View Dependent Claims (14, 15, 16)
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3. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100 ps; at least one fiber amplifier following said pulse stretcher system; and a pulse compressor configured to compress said stretched pulses by more than a factor of 50 to produce compressed pulses having a bandwidth greater than 1 nm, further comprising an adaptively controlled pulse shaper located up-stream of said at least one fiber amplifier and configured to pre-compensate for self-phase modulation in said at least one fiber amplifier. - View Dependent Claims (17, 18, 19)
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4. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100 ps; at least one diode laser amplifier, parametric amplifier, Raman amplifier, or combination thereof following said pulse stretcher system; and a pulse compressor configured to compress said stretched pulses by more than a factor of 50 to produce compressed pulses having a bandwidth greater than 1 nm, wherein the pulse stretcher system is configured to produce stretched pulses having a group delay ripple less than about 10 ps. - View Dependent Claims (20, 21, 22)
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5. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100 ps; at least one diode laser amplifier, parametric amplifier, Raman amplifier, or combination thereof following said pulse stretcher system; and a pulse compressor configured to compress said stretched pulses by more than a factor of 50 to produce compressed pulses having a bandwidth greater than 1 nm, wherein the pulse stretcher system is configured to produce stretched pulses having a group delay ripple less than about 2 ps. - View Dependent Claims (23, 24, 25)
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6. A chirped pulse amplification system comprising:
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at least one low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher for producing stretched pulses; at least one fiber amplifier following said pulse stretcher; and a pulse compressor for compressing said stretched pulses to produce compressed pulses having an energy greater than 100 nJ and a bandwidth greater than 1 nm, wherein said pulse stretcher is configured to produce stretched pulses having a group delay ripple less than about 10 ps. - View Dependent Claims (26, 27, 28)
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7. A chirped pulse amplification system comprising:
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at least one low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher for producing stretched pulses; at least one fiber amplifier following said pulse stretcher; and a pulse compressor for compressing said stretched pulses to produce compressed pulses having an energy greater than 100 nJ and a bandwidth greater than 1 nm, wherein said pulse stretcher is configured to produce stretched pulses having a group delay ripple less than about 2 ps. - View Dependent Claims (29, 30, 31)
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8. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher; at least one fiber amplifier following said pulse stretcher and having a substantially step index profile; and a pulse compressor for compressing stretched pulses to produce compressed pulses having a bandwidth greater than 1 nm, wherein the pulse stretcher is configured to exhibit a group delay ripple less than about 10 ps. - View Dependent Claims (32, 33, 34)
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9. A chirped pulse amplification system comprising:
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a low group delay ripple nonlinearly chirped fiber Bragg grating pulse stretcher; at least one fiber amplifier following said pulse stretcher and having a substantially step index profile; and a pulse compressor for compressing stretched pulses to produce compressed pulses having a bandwidth greater than 1 nm, wherein the pulse stretcher is configured to exhibit a group delay ripple less than about 2 ps. - View Dependent Claims (35, 36, 37)
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10. A chirped pulse amplification system comprising:
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a nonlinearly chirped fiber Bragg grating pulse stretcher system, said pulse stretcher system configured to produce stretched pulses longer than 100 ps; at least one amplifier following said pulse stretcher system; and a pulse compressor configured to compress said stretched pulses by more than a factor of 50; and an adaptively controlled pulse shaper located up-stream of said at least one amplifier, in order to pre-compensate for self-phase modulation in said at least one amplifier. - View Dependent Claims (38, 39, 40)
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Specification