Abstract
A stable and tunable self-seeded multiwavelength Brillouin-erbium fiber laser (BEFL) is designed and demonstrated based on a Single-Mode-Multimode-Single-Mode (SMS) fiber filter. The SMS filter is fabricated by splicing a 15cm long multimode fiber between two single mode fibers. The self-excited Brillouin pump is internally achieved by cascaded stimulated Brillouin scattering (SBS) in the single mode fiber. By applying axial strain (from 0 to 466.7μϵ) to the SMS filter with the same step of 66.7μϵ, the multiwavelength of the output laser is tuned from 1553.58 to 1559.79nm correspondingly, and the tunable range is 6.21nm. The generation of up to 16 Brillouin Stokes wavelengths with 30dB optical signal to noise ratio (OSNR) are obtained.
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