Dual-wavelength fiber Bragg grating laser with independently controllable output polarization

Wavelength-tunable passband-squeezed polarization-diversified fiber loop comb filter using heterogeneous waveplate combination

“…3 Polarization controllability within the PDFL using some polarization controllers (PCs) has also been utilized to demonstrate the inline selection of transmission or reflection spectra of different fiber Bragg gratings, 4,5 polarization-insensitive polarization plane excitation devices, 6 and optical fiber lasers with independently controllable output polarization. 7 Among these applications, fiber comb filters can be beneficially applied to optical label swapping/erasing, 8 optical pulse train generation, 9 multiwavelength selection/oscillation, 10,11 and microwave signal processing. 12,13 In particular, PDFL comb filters have superiority in terms of the wavelength controllability and spectral shaping capability 3,14,15 in comparison with Sagnac fiber loop-based comb filters based on directional couplers [16][17][18] and Mach-Zehnder interferometer-based comb filters.…”

“…A polarization-diversified fiber loop (PDFL) implemented by connecting two output ports of a polarization beam splitter (PBS) has been employed to realize polarization independence in various fiber-optic applications, such as optical demultiplexers, 1 frequency converters, 2 and comb filters 3 . Polarization controllability within the PDFL using some polarization controllers (PCs) has also been utilized to demonstrate the inline selection of transmission or reflection spectra of different fiber Bragg gratings, 4 , 5 polarization-insensitive polarization plane excitation devices, 6 and optical fiber lasers with independently controllable output polarization 7 . Among these applications, fiber comb filters can be beneficially applied to optical label swapping/erasing, 8 optical pulse train generation, 9 multiwavelength selection/oscillation, 10 , 11 and microwave signal processing 12 , 13 .…”