Title :
Integrated optical demultiplexer for WDM systems
Author :
De Sario, M. ; D´Orazio, A. ; Lanave, V. ; Petruzzelli, V.
Author_Institution :
Dipartimento di Elettrotecnica ed Elettronica, Bari, Italy
Abstract :
The authors propose a wavelength division multiplexing (WDM) duplexer based on a nonuniform frequency-dependent coupler whose spectral selectivity depends on appropriate taper-functions for the coupling coefficient in the case of codirectional interaction. The frequency response of the codirectional tapered coupler is governed by the Riccati equation, the coupling characteristics being calculated in terms of the supermodes of the overall structure and of the modes of the individual waveguides. The design parameters spring from the technological constraints imposed by Ti:LiNbO3 technology and the mask design rules obtainable by the current photolithographic apparatus. The optimized insertion losses are 0.9 and 2.3 dB for the filters centered at the wavelengths 1330 and 1550 nm, respectively. The crosstalk level is about 25 dB
Keywords :
frequency division multiplexing; integrated optics; multiplexing equipment; optical communication equipment; optical couplers; optical waveguides; 0.9 dB; 1330 nm; 1550 nm; 2.3 dB; FDM; LiNbO3:Ti; Riccati equation; WDM; codirectional interaction; coupling coefficient; crosstalk level; design; filters; frequency response; insertion losses; integrated optical demultiplexer; nonuniform frequency-dependent coupler; spectral selectivity; taper-functions; waveguides; wavelength division multiplexing duplexer; Fiber nonlinear optics; High speed optical techniques; Integrated optics; Nonlinear optics; Optical crosstalk; Optical filters; Optical receivers; Optical transmitters; Stimulated emission; Wavelength division multiplexing;
Conference_Titel :
Electrotechnical Conference, 1989. Proceedings. 'Integrating Research, Industry and Education in Energy and Communication Engineering', MELECON '89., Mediterranean
Conference_Location :
Lisbon
DOI :
10.1109/MELCON.1989.50107
