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Tunable all-fiber dissipative-soliton laser with a multimode interference filter.
Lei Zhang1, Jinmeng Hu, Jianhua Wang
1Shanghai Key Laboratory of Solid State Laser and Applications, and Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
Optics Letters
|October 9, 2012
Summary
We developed a tunable all-fiber laser using a novel multimode interference filter. This laser generates ultrashort pulses with adjustable wavelengths, advancing fiber laser technology.
Area of Science:
- Laser Physics
- Fiber Optics
- Photonics
Background:
- Mode-locked fiber lasers are crucial for various applications, including spectroscopy and material processing.
- Dissipative solitons offer unique pulse characteristics but require precise spectral control.
- Existing tuning mechanisms can be complex or limited in range.
Purpose of the Study:
- To demonstrate a tunable all-fiber dissipative-soliton laser.
- To introduce a novel multimode interference (MMI) filter for spectral control.
- To achieve wavelength tunability in an all-normal-dispersion mode-locked ytterbium-doped fiber laser.
Main Methods:
- Fabrication of an MMI filter by splicing a multimode fiber between two single-mode fibers.
- Integration of the MMI filter into an all-normal-dispersion ytterbium-doped fiber laser cavity.
- Utilizing nonlinear polarization evolution for mode-locking.
- Applying mechanical tension to the MMI filter for wavelength tuning.
Main Results:
- A stable all-fiber dissipative-soliton laser operating at a central wavelength of 1032 nm with a 7.6 nm bandwidth.
- Generation of positively chirped 7 ps pulses with 31 mW average output power, 15.3 MHz repetition rate, and 2.1 nJ pulse energy.
- Achieved 12 nm of tunable dissipative-soliton operation by adjusting filter tension.
Conclusions:
- The MMI filter provides effective spectral filtering and enables tunable dissipative-soliton generation in fiber lasers.
- This tunable all-fiber laser design offers a compact and practical solution for applications requiring adjustable wavelengths.
- The results highlight the potential of MMI structures for advanced fiber laser development.
