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Published on: November 22, 2019
Pulse shaping fiber laser at 1.5 μm.
Peng Wan1, Jian Liu, Lih-Mei Yang
1PolarOnyx Inc., 2526 Qume Drive, Suites 17 & 18, San Jose, California 95131, USA. pwan@polaronyx.com
Applied Optics
|January 25, 2012
Summary
This study introduces novel pulse shaping technology to enhance high-energy fiber laser systems. The new method extends pulse duration and boosts energy output, improving laser performance.
Area of Science:
- Fiber laser technology
- Nonlinear optics
- Laser engineering
Background:
- High-energy fiber lasers face challenges like pulse narrowing and Stimulated Brillouin Scattering (SBS).
- Erbium-Ytterbium (Er:Yb) codoped fiber systems are crucial for 1.5 μm applications.
- Existing methods struggle to achieve long pulse durations and high energies simultaneously.
Purpose of the Study:
- To present a novel pulse shaping technology for Er:Yb codoped fiber master oscillator power amplifier (MOPA) systems.
- To mitigate pulse narrowing and SBS effects in high-energy fiber lasers.
- To achieve longer pulse durations and higher pulse energies at 1.5 μm.
Main Methods:
- Implementation of advanced modulation schemes for the seed laser.
- Utilizing an Er:Yb codoped fiber MOPA architecture.
- Characterization of pulse duration, energy, average power, and beam quality.
Main Results:
- Successfully mitigated pulse narrowing and SBS effects.
- Achieved an average power exceeding 1.3 W at a 10 kHz repetition rate.
- Obtained a pulse energy of over 0.13 mJ with a pulse duration of 200 ns.
- Demonstrated near-diffraction-limited beam quality (M(2)<1.2).
Conclusions:
- The novel pulse shaping technology effectively enhances high-energy fiber laser performance.
- This advancement enables longer pulse durations and higher energies in Er:Yb codoped fiber MOPA systems.
- The results pave the way for improved laser sources in various applications requiring high energy and good beam quality.
