Stimulated Brillouin Scattering in Dispersion-Compensating Fibers

Threshold and maximum power evolution of stimulated Brillouin scattering and Rayleigh backscattering in a single mode fiber segment

“…Terminal 3 of the circulator was used for measuring the backward Brillouin and Rayleigh power, and an insertion loss of 1.2 dB [9] of the circulator was considered. The forward residual pump power was measured at the end of the fiber.…”

“…Therefore, the fiberinput power should be kept lower than the SBS threshold that would define the maximum power that can be coupled into the fiber. There are numerous studies of this phenomenon dealing with power threshold determination which represents the limit on the transmit power but many of them are very complex [6][7][8][9][10]. This study deals with SBS and Rayleigh backscattering in the continuous wave (CW) regime.…”

Tunable microwave photonic frequencies generation based on stimulated Brillouin scattering operating in the L‐band region

“…where, A eff is the effective cross section of fiber used, g B (m B ) is the peak value of the Brillouin gain coefficient, Dm p is the linewidth for BP, D mp D mB is the ratio of frequency linewidth of the pump over the spontaneous Brillouin linewidth [9], and L eff is the effective length of the fiber used, which is also the gain medium. The effective length of the fiber is given by the expression below,…”

“…There is a minimum power requirement to generate the first Stoke and this is given by Eq. (2) [9] as, where, A eff is the effective cross section of fiber used, g B (ν B ) is the peak value of the Brillouin gain coefficient, Δν p is the linewidth for BP, $ \left( {{{\Delta \mathop \nu \nolimits_{\rm p} } \over {\Delta \mathop \nu \nolimits_{\rm B} }}} \right) $ is the ratio of frequency linewidth of the pump over the spontaneous Brillouin linewidth [9], and L eff is the effective length of the fiber used, which is also the gain medium. The effective length of the fiber is given by the expression below, where L is the length of the DCF fiber, which acts also as the nonlinear medium, and α is the attenuation coefficient.…”

“…An improvement to this is to use a single laser, using SBS to up and down convert the RF signal and using fiber bandgap (FBGs) to simplify the process [9,10]. The demonstrations are around the C-band region of the optical transmission spectrum and are limited to single input wavelength of a distributed feedback laser (DFB).…”