The fiber laser sources operating in the near 2 μm band.
A switchable single-polarization, dual-wavelength TDFL using PM F–P filter.
The OSNRs of the single-polarization operation can reach 60 dB.
The PERs of the single-polarization operation are higher than 33 dB.
The slope efficiency of the single-polarization operation are 6.26% and 8.79%.