Effects of output coupler reflectivity on the performance of a linear cavity Brillouin/erbium fiber laser

Abstract

The effect of output coupler reflectivity (or output coupling ratio) on the performance of a linear cavity Brillouin/erbium fiber laser (BEFL) is demonstrated. The operating wavelength, output laser power and number of channels vary with changes in the coupling ratio in the linear cavity system. The optimum BEFL operation is obtained with an output coupling of 40%, i.e., 60% of the laser power is allowed to oscillate in the cavity. A stable laser comb consisting of up to 40 channels with line spacings of approximately 0.09 nm are obtained at the Brillouin pump and 980 nm pump with powers of 2.5 mW and 100 mW, respectively. The linear cavity BEFL has the potential to be used in inexpensive wavelength division multiplexing system.Keywords. Stimulated Brillouin scattering process; coupling ratio; linear cavity; multiwavelength Brillouin/erbium fiber laser; Brillouin/erbium fiber laser. PACSNos 42.60.Da; 42.81.-i; 42.81.Wg; 42.81.Uv

The generation of a lower threshold multiwavelength fiber laser in the L-band region assisted by a Sagnac loop mirror

“…This is due to the increase of cavity loss. In addition, the power intensity of each laser peak also increases with the increase in the value of R. The emission of the laser comb is dependent on the emission and the absorption cross-section of the EDF [13].…”