Dual-wavelength pulse generation from a 2.8 μm spatiotemporally mode-locking fiber laser based on nonlinear polarization rotation

Key Points

• Pulse generation in this fiber laser occurred at two distinct wavelengths, enhancing output versatility.
• The system achieved a minimum pulse width of 300 femtoseconds, providing high temporal resolution.
• Analysis of the spatiotemporally mode-locking mechanism utilized nonlinear polarization rotation.
• This development supports potential applications in telecommunications and precise measurements.