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Limits of Femtosecond Fiber Amplification by Parabolic Pre-Shaping
Walter Fu1, Yuxing Tang1, Timothy S McComb2
1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
Journal of the Optical Society of America. B, Optical Physics
|March 24, 2017
Summary
We demonstrate parabolic pre-shaping for ultrashort pulse amplification, achieving significant pulse compression and high gain. This method advances femtosecond fiber amplifier technology, with potential for further improvements.
Area of Science:
- Optics and Photonics
- Ultrafast Laser Science
Background:
- Generating and amplifying ultrashort pulses is crucial for various scientific applications.
- Existing methods face limitations in achieving high energy, short duration, and high gain simultaneously.
Purpose of the Study:
- To explore parabolic pre-shaping as a technique for ultrashort pulse generation and amplification.
- To develop a theoretical framework and design a practical femtosecond fiber amplifier based on this technique.
Main Methods:
- Development of a theoretical model for parabolic pre-shaping in pulse amplification.
- Design and implementation of a femtosecond fiber amplifier utilizing the developed theoretical framework.
- Experimental characterization of amplified pulse properties, including duration, energy, and gain.
Main Results:
- Achieved nearly transform-limited 275 fs pulses from initial 9 ps pulses.
- Obtained pulse energy of 4.3 μJ with over 40 dB gain.
- Demonstrated a 33-fold pulse compression factor.
Conclusions:
- Parabolic pre-shaping is an effective method for generating and amplifying ultrashort pulses with high performance.
- Raman scattering identified as a limiting factor for further improvements.
- A method is proposed for further enhancing pulse duration and energy tailoring for specific applications.
