All-optical 2-to-4 level encoder based on cross polarization modulation in a semiconductor optical amplifier utilized to develop an all-optical 2 input digital multiplexer

Abstract

An all-optical 2-to-4 level encoder based on cross polarization modulation in a semiconductor optical amplifier utilized to develop a 2 input digital multiplexer is presented. The most important feature of this device is the potential it has to improve the use of the available channel bandwidth on communications systems on an all-optical environment.

Numerical Modeling and Experimental Investigation of the Nonlinear Polarization Rotation Phenomenon in Semiconductor Optical Amplifiers

“…The nonlinear polarization rotation, which occurs in the SOA, is demonstrated to achieve very interesting applications in optical networks. However, it is exploited to assure optical gates [9][10][11][12], multiplexers [13], wavelength converters [14,15], regenerators…”

Evaluation of the cross-polarization modulation impact on the SOA behavior: Using to perform all-optical signal processing

“…A wide number of applications for SOAs have been demonstrated based on nonlinear effects as cross-phase modulation (XPM) [1], [2], cross-gain modulation (XGM) [3], [4], four-wave mixing (FWM) [5], [6] and cross-polarization modulation (XPolM) [7], [8]. These nonlinear effects are then used to design new functions for all-optical signal processing.…”

Power equalization for the optical subsystems based on the SOA polarization rotation

“…Recently the polarization rotation (PR) induced by birefringence in semiconductor optical amplifier (SOA) has received considerable interest, and has already been used in wavelength conversion [1], logical gates [2], optical multiplexing [3], and fiber loop optical buffer shown in Fig.1. However due to the gain saturation characteristic of SOA, the output signal from the SOA PR-based subsystem will get several dB power fluctuation, regardless of that whether the SOA PR results from the bias current variation or optical control pulse injection.…”