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Updated: Jan 29, 2026
08:48
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
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Bulk-structured PtSe2 for femtosecond fiber laser mode-locking
Optics Express
|February 9, 2019
Summary
Researchers demonstrated a femtosecond fiber laser using platinum diselenide (PtSe2) as a pulse modulator. This advancement showcases PtSe2
Area of Science:
- Optoelectronics
- Laser Physics
- Materials Science
Background:
- Pulsed fiber laser technology is crucial for applications like optical communications, sensing, and material processing.
- Transition metal dichalcogenides (TMDs) offer unique nonlinear optical properties for laser modulation.
Purpose of the Study:
- To demonstrate a femtosecond Er-doped fiber laser operating at 1560 nm.
- To utilize bulk-structured platinum diselenide (PtSe2) as a novel pulse modulator.
Main Methods:
- Fabrication of a PtSe2 modulator via mechanical exfoliation from single crystals.
- Transfer of exfoliated PtSe2 onto a D-shaped fiber for evanescent field interaction.
- Achieving Q-switched and mode-locked operations by controlling intra-cavity polarization.
Main Results:
- Self-starting Q-switched operation was achieved due to strong PtSe2-evanescent field interaction.
- Stable mode-locked operation was obtained with a pulse duration of 861 fs.
- A high signal-to-noise ratio (SNR) of 61.1 dB was recorded for the mode-locked pulses.
Conclusions:
- The experimental results confirm the excellent nonlinear optical performance of PtSe2.
- PtSe2 shows significant potential for ultrafast applications in both bulk and low-dimensional forms.
- This work paves the way for utilizing TMDs in advanced laser systems.
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