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Femtosecond solid-state laser based on tungsten disulfide saturable absorber
Optics Express
|October 20, 2015
Summary
Few-layer tungsten disulfide (WS2) nanosheets were developed for solid-state lasers. This novel WS2 film achieved excellent mode-locking performance, demonstrating its potential for advanced laser applications.
Area of Science:
- Materials Science
- Optics and Photonics
- Nanotechnology
Background:
- Tungsten disulfide (WS2) is a promising two-dimensional material.
- Developing novel materials for solid-state lasers is crucial for advancing laser technology.
Purpose of the Study:
- To design and fabricate a new WS2 film composed of few-layer WS2 nanosheets.
- To investigate the mode-locking performance of this WS2 film in a solid-state laser cavity.
Main Methods:
- Fabrication of few-layer WS2 nanosheets uniformly spread over a SiO2 substrate.
- Integration of the WS2 film into a solid-state laser cavity.
- Characterization of the mode-locking performance, including pulse repetition rate and pulse width.
Main Results:
- Excellent mode-locking (ML) performance was achieved using the WS2 film.
- The solid-state laser generated pulses with a repetition rate of 86.7 MHz.
- A short pulse width of 736 fs was recorded, indicating high-quality mode-locking.
Conclusions:
- The designed few-layer WS2 nanosheet film exhibits excellent mode-locking capabilities.
- WS2 material holds significant promise for future applications in solid-state lasers.
- This study highlights the potential of WS2-based saturable absorbers for ultrafast optics.
