Power dependence of Brillouin linewidths in a silica fiber.
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.
Qin
Guanshi
G
Research Center for Advanced Photon Technology, Toyota Technological Institute, Nagoya, Japan. gsqin@yahoo.com
Suzuki
Takenobu
T
Ohishi
Yasutake
Y