With the lowest threshold, stimulated Brillouin scattering (SBS) is one of the most common nonlinear effectsin optical fibers. Due to the Kramers{Kronig relation, every SBS interaction is inevitably accompanied by aphase response, providing an excellent chance for dispersion manipulation. By engineering the Brillouin gainspectrum, numerous demanding requirements on dispersion engineering can be fulfilled via SBS interactionsin various applications. In this paper, examples of gain spectrum engineering and dispersion engineering forBrillouin static and dynamic sensing will be presented. With a well engineered gain spectrum, a static Brillouinsensor is more robust to noise and offers a 3-dB measurement accuracy enhancement. In simulations, more thanone magnitude of sensitivity enhancement has been demonstrated for dynamic sensors.
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