Two simultaneous operating regimes in an Erbium doped-fiber laser

•A Multiwavelength laser beam is proposed with paired arrayed waveguide gratings.•We demonstrate two operating regime of Erbium doped-fiber tunable and simultaneous.•One of regimes is active mode-locking at stable 10 GHz, the other is CW.•Others operation regimes of fiber lasers may be proposed within this configuration.

This work presents an Erbium doped fiber laser operating simultaneously in two distinct regimes, active mode-locking and continuous wave (CW), by introducing two arrayed waveguide gratings (AWG) paired inside ring cavity. Active phase modulator operating at 10 GHz and a single mode fiber were introduced between the two AWGs to allow the two operating regimes. The mode-locking was able to generated pulses with 30 ps simultaneous with the CW line. Both lasers could be tunable independent and simultaneously from 1530 nm to 1565 nm.