Abstract
This article presents a numerical investigation of the propagation and
switching of ultra-short pulses (2 ps) using a fiber-optic Michelson
interferometer. In this study, the performance of the Michelson
interferometer is studied as a function of the non-linear
characteristics of the coupler and the fiber Bragg gratings. The
numerical studies were done starting from the coupled-mode equations
solved using the fourth-order Runge-Kutta method. The switching
characteristic of the short pulses was examined as a function of pump
power and the dephasing in the reflection amplitude of one of the Bragg
gratings in order to obtain an add-drop filter operation. Transmission
characteristics, such as cross-talk level, extinction ratio coefficient,
and compression factor, were analyzed for different dephasing values and
pump powers. Pump powers were examined from below the critical power of the coupler of switching (P = 1 W), at the critical power of switching (Pc = 1.73 W), and above (P = 1.95 W). Through this study, one can
verify that the transmission, cross-talk level, extinction coefficient,
and compression factor depend on the pump power inserted into the device
and in the dephasing. The optical fiber Michelson interferometers with
identical gratings in the two output arms implement important components
as a demultiplexer in add-drop devices. This device has attracted great
interest in the field of all-optical switching in telecommunications for
operating with high transmission rates.
Users
Please
log in to take part in the discussion (add own reviews or comments).