Analytical investigation of modulation instability in a fiber Bragg grating.
Modulation instability (MI) in a fiber Bragg grating (FBG) is investigated and reviewed analytically. The dispersion relation equation of MI obtained from the coupled-mode equation is solved exactly. The closed-form expressions of the gain of MI and the threshold condition in the normal dispersion regime are derived. The results from the closed-form expressions are well consistent with those from numerical simulations and previous literature. Based on the analytical investigation, the characteristics of MI in an FBG are analyzed.
Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 10086, China.
Peiming
P
Shi
Song
S
Yu
Tao
T
Liu
Jing
J
Shen
Wanyi
W
Gu