External disturbance of potential energy photon in fiber Bragg grating

The effect of nonlinear parametric known as alpha (α), beta (β) and gamma (γ) has been successfully calculated and a new effect of theta (θ) is introduced to describe the motion of photon in a fiber Bragg grating as a factor of external disturbance. This study is developed under Bragg resonance condition where the initial frequency of the light, ω0 is the same value as the Bragg frequency, ωB. We found that the potential well is not symmetric and conserved. © 2010 SPIE.