title: Power dependence of Brillouin linewidths in a silica fiber.
abstract: We report the dependence of Brillouin linewidths on the pump power below the threshold of Brillouin lasing in a silica fiber. The Stokes Brillouin shift in a silica fiber is nearly unchanged, and its linewidth decreases with increasing pump power. However, the anti-Stokes Brillouin shift becomes smaller and its linewidth larger with increasing pump power. We explain these experimental results by the distributed fluctuating source model.
authors.affiliation: Research Center for Advanced Photon Technology, Toyota Technological Institute, Nagoya, Japan. gsqin@yahoo.com
authors.forename: Guanshi
authors.initials: G
authors.lastname: Qin
authors.forename: Takenobu
authors.initials: T
authors.lastname: Suzuki
authors.forename: Yasutake
authors.initials: Y
authors.lastname: Ohishi