Tunable multiwavelength BrillouinErbium fiber laser by controlling self-lasing cavity modes oscillation
A novel and simple tunable multiwavelength BrillouinErbium fiber laser (BEFL) by controlling self-lasing cavity modes oscillation is demonstrated. With a variable optical attenuator (VOA) effectively optimizing the shape of the gain spectrum of the BEFL, the self-lasing cavity modes oscillation can be tuned in a large wavelength range, which can be used to enlarge the tunable multiwavelength range of the BEFL. A passive Erbium-doped fiber (EDF) gain section inserted in the BEFL cavity can help to further enlarge the tunable multiwavelength range of the BEFL and effectively suppress the cavity modes competition. With an EDF pump power of 50mW and a Brillouin pump power of 1.2mW, a tunable cavity modes oscillation range of 19.4nm and a tunable multiwavelength range of 23nm are obtained.
tunable multiwavelength brillouinerbium fiber lasers variable optical attenuator passive erbium-doped fiber stimulated brillouin scattering