Wavelength-Switchable Erbium-Doped Fiber Ring Laser Based on Inline Switching Filter

We represent that the wavelength switching fiber laser based on polarization-diversity loop (PDL) can flexibly select lasing output spectra with two different resonance wavelenghs of two fiber Bragg gratings (FBGs). In the fabricated fiber ring laser, the each resonance wavelength of two FBGs (FBG 1 and FBG 2) was measured as 1549.96 nm and 1554.98 nm, respectively. Also the signal-to-noise ratios (SNR) of the lasing lines at 1549.96 nm and 1554.98 nm are representes as ~50.6 dB and ~53.4 dB, respectively.