正弦波変調信号光を用いた自己位相変調(SM-SPM)法によるシングルモード光ファイバの非線形定数測定
In this paper, we proposed nonlinear constant measurement method using sinusoidally modulated signal based on self-phase modulation (SM-SPM) technique. LiNbO3 modulator generated two side bands of fundamental wavelengths. It is very ideal that optical power of two fundamental wavelengths are line symmetry and its wavelengths spacing can be changed by controlling modulation frequency. It is confirmed that measurement repeatability of nonlinear constant (n2/Aeff) and nonlinear refractive index (n2) of SM-SPM method are a little superior to that of conventional CW-SPM method using two CW-LDs. Moreover, the averaged values of measurement results of SM-SPM method are in good agreement with that of the CW-SPM method.