Title :
Increase of the SBS threshold in a short highly nonlinear fiber by applying a temperature distribution
Author :
Hansryd, J. ; Dross, F. ; Westlund, M. ; Andrekson, P.A. ; Knudsen, S.N.
Author_Institution :
Photonics Lab., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
11/1/2001 12:00:00 AM
Abstract :
We evaluate numerically and experimentally the stimulated Brillouin scattering (SBS) threshold increase for a short, highly nonlinear GeO2-doped fiber by applying different temperature distributions along the fiber. The temperature coefficient for the Brillouin frequency downshift is measured to 1.2 MHz/°C. A threefold SBS threshold increase is obtained for a 100-m long highly nonlinear fiber with a 140°C temperature gradient. The proposed scheme is implemented in a wavelength converter based on fiber optical four-wave mixing (FWM). The SBS suppression scheme shows negligible influence on the FWM efficiency as well as the wavelength conversion bandwidth. The temperature coefficient for the zero dispersion wavelength is measured to 0.062 nm/°C
Keywords :
germanium compounds; multiwave mixing; optical fibre communication; optical fibre dispersion; optical fibre theory; optical wavelength conversion; silicon compounds; stimulated Brillouin scattering; temperature distribution; 100 m; Brillouin frequency downshift; Brillouin scattering; Brillouin scattering threshold; FWM; GeO2-doped fiber; SBS suppression scheme; SBS threshold; SiO2-GeO2; fiber optical four-wave mixing; four-wave mixing; highly nonlinear fiber; nonlinear phenomena; short highly nonlinear fiber; stimulated Brillouin scattering threshold; temperature coefficient; temperature distribution; temperature distributions; temperature gradient; threefold SBS threshold; wavelength conversion; wavelength conversion bandwidth; wavelength converter; zero dispersion wavelength; Bandwidth; Brillouin scattering; Fiber nonlinear optics; Four-wave mixing; Frequency measurement; Optical mixing; Optical scattering; Optical wavelength conversion; Temperature distribution; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
