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Developing high energy dissipative soliton fiber lasers at 2 micron
Chongyuan Huang1,2, Cong Wang1, Wei Shang1
1Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Scientific Reports
|September 9, 2015
Summary
Researchers achieved high-energy 2-micrometer (µm) ultrafast laser pulses by shortening the gain fiber. This overcomes challenges with anomalous dispersion, enabling pulse energies comparable to 1 µm and 1.5 µm lasers.
Area of Science:
- Laser Physics
- Ultrafast Optics
- Fiber Lasers
Background:
- Dissipative solitons enable high pulse energy in 1 µm and 1.5 µm fiber lasers.
- Scaling pulse energy at 2 µm is challenging due to anomalous dispersion in gain fibers.
Purpose of the Study:
- To investigate methods for increasing pulse energy in 2 µm fiber lasers.
- To overcome limitations imposed by anomalous dispersion in gain media.
Main Methods:
- Analysis of intracavity pulse dynamics in mode-locked fiber lasers.
- Proposal and numerical simulation of condensing gain fiber length.
- Experimental validation of the proposed method.
Main Results:
- Numerical simulations predict stable 2 µm dissipative soliton solutions with pulse energy exceeding 10 nJ.
- Achieved pulse energy is comparable to that in 1 µm and 1.5 µm regimes.
- Experimental results confirm the effectiveness of the shortened gain fiber approach.
Conclusions:
- Shortening the gain fiber is a viable strategy for generating high-energy 2 µm pulses.
- This work advances understanding of mode-locked fiber lasers across different wavelengths.
- Significant step towards achieving high-energy ultrafast laser pulses from anomalous dispersion gain media.
