We experimentally demonstrate that the reflection spectrum of a Brillouin dynamic grating in a polarization- maintaining fiber can be much narrower than the intrinsic linewidth of the stimulated Brillouin scattering, matching well with the theory of a fiber Bragg grating in terms of the linewidth and the reflectivity. A bandwidth as narrow as is observed with the Brillouin dynamic grating generated in a uniform fiber.
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ErrataKwang Yong Song and Hyuk Jin Yoon, "Observation of narrowband intrinsic spectra of Brillouin dynamic gratings: erratum," Opt. Lett. 37, 5039-5039 (2012)