研究目的
Investigating the use of monolayer MoTe2 film as a saturable absorber in ultrafast fibre lasers to achieve single- and dual-wavelength solitons at the telecommunication band.
研究成果
Monolayer MoTe2 film exhibits nonlinear saturable absorption property and is capable of serving as an effective mode locker for ultrafast fibre lasers, enabling stable single- and dual-wavelength operations. This opens up new possibilities for the application of MoTe2 in ultrafast optics.
研究不足
The study focuses on the telecommunication band and may not cover the full potential applications of MoTe2 in other wavelength regimes. The stability and performance of the saturable absorber under varying environmental conditions are not extensively discussed.
1：Experimental Design and Method Selection:
The study involves the synthesis of a saturable absorber by coating monolayer MoTe2 film on the pinhole of a fibre pigtail and its incorporation into a fibre laser setup to achieve mode-locking operations.
2：Sample Selection and Data Sources:
Monolayer MoTe2 films are prepared through mechanical exfoliation from bulk MoTe2 crystals and characterized using Raman spectroscopy.
3：List of Experimental Equipment and Materials:
The setup includes a 9-m erbium-doped fibre, a 102 m standard single mode fibre, a 980-nm laser diode, a polarization independent isolator, a polarization controller, and a 10/90 optical coupler.
4：Experimental Procedures and Operational Workflow:
The laser's output performances are monitored using an optical spectrum analyser, an autocorrelator, an oscilloscope, and a radio-frequency analyser.
5：Data Analysis Methods:
The pulse duration and signal-to-noise ratio are calculated from the experimental data to assess the laser's performance.
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