[OPTICAL REVIEW Vol. 4, No. 4 (1997) 476-480]

Chaos in Fiber-Optic Stimulated Brillouin Scattering Dependent on Pump Power, Nonlinear Refractive Index, Feedback Power, and Fiber Length

Yoh IMAI and Hiroshi ASO

Department of Computer Science and Electronics, Kyushu Institute of Technology, 680-4, Kawazu, Iizuka-shi, Fukuoka, 820 Japan

(Received February 7, 1997; Accepted May 21, 1997)

Dependence of Stokes dynamics in stimulated Brillouin scattering generated in optical fibers on the pump power, the nonlinear refractive index, the fiber length, and the feedback powers of the pump and the Stokes is numerically analyzed. The Stokes power fluctuation becomes complicated and chaotic as the nonlinear refractive index and the input pump power increase in a fiber of sufficient length. The Stokes dynamics is less complicated and the chaotic region decreases in a pump power-reflectivity domain in a short fiber. The chaotic behavior appears without regular tendency in relation to the feedback power. Taking into account the pump feedback, the chaotic region expands and some Stokes behaviors are different in the Pp-R domain graph, compared with the case with the Stokes feedback alone, although this feedback does play an essential role in Stokes dynamics.

Key words : optical nonlinear effect, stimulated Brillouin scattering, optical chaos, fiber optics