Figure 1

Configuration of the NPE-based dual-wavelength mode-locked fiber laser. PBS, polarization beam splitter; ISO, polarization-dependent isolator; λ/2, half waveplate; λ/4, quarter waveplate; WDM, wavelength-division multiplexer.
Configuration of the NPE-based dual-wavelength mode-locked fiber laser. PBS, polarization beam splitter; ISO, polarization-dependent isolator; λ/2, half waveplate; λ/4, quarter waveplate; WDM, wavelength-division multiplexer.