Tunable all-normal dispersion Yb-doped fiber laser

Both tunable continuous-wave(CW) and passively mode-locked pulses of all-normal dispersion (ANDi) Yb-doped fiber laser (YDFL) with phase-shifted long period fiber grating (PS-LPFG) as a all-fiber format spectrum fused in the laser cavity was reported and demonstrated, in which the output wavelengths can be tuned over a spectral range of 11.4 nm for the CW mode and 10.5 nm for the mode-locking mode, respectively.