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Energy scaling of a nonlinear compression setup using passive coherent combining
Optics Letters
|November 2, 2013
Summary
Researchers scaled output energy for nonlinear temporal compression by creating 32 pulse replicas. This method achieved 71 femtosecond pulses with 7.5 microjoules of energy, reaching 86 megawatts of peak power.
Area of Science:
- Nonlinear optics
- Laser physics
- Pulse compression
Background:
- Scaling output energy in laser systems is crucial for advanced applications.
- Nonlinear temporal compression techniques face limitations due to self-focusing.
- Coherent combining offers a path to overcome energy scaling limitations.
Purpose of the Study:
- To implement passive spatial and temporal coherent combining schemes.
- To scale the output energy of a nonlinear temporal compression setup.
- To achieve high-energy femtosecond pulses beyond self-focusing limits.
Main Methods:
- Generating 32 replicas of incident femtosecond pulses.
- Utilizing self-phase modulation in a large-mode-area rod-type fiber.
- Employing passive spatial and temporal coherent combining.
Main Results:
- Successfully compressed high-energy fiber chirped-pulse amplifier output.
- Achieved 71 femtosecond (fs) pulses with 7.5 microjoule (μJ) energy.
- Demonstrated 86 megawatt (MW) peak power at a 100 kHz repetition rate.
Conclusions:
- Passive coherent combining effectively scales output energy in nonlinear compression.
- The demonstrated technique surpasses self-focusing power limitations.
- This method enables the generation of high-energy, ultrashort pulses for various applications.
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