LOSSLESS STRIPE WAVE-GUIDE OPTICAL BEAM SPLITTER - MODELING OF THE Y-STRUCTURE

We present a theoretical model of a loss-compensated symmetric Y-junct ion acting as an optical beam splitter, We consider silica (SiO2) chan nel waveguides which are assumed to be highly doped with Er3+, The mod el was developed using the beam propagation method (BPM) and a fast-Fo urier-transform (FFT)-based algorithm, The analysis showed that consid erable gain levels, about 4.2 dB/cm at each port of the Y-junction, ca n be achieved for erbium concentration 2.5 x 10(20) ions/cm(3), signal power 1 mu W and pump power 250 mW.