Title :
Wavelength demultiplexer using the spatial dispersion of multilayer thin-film structures
Author :
Gerken, M. ; Miller, D.A.B.
Author_Institution :
Edward L. Ginzton Lab., Stanford Univ., CA, USA
Abstract :
We demonstrate that a single 66-layer nonperiodic thin-film stack can be used to separate four wavelength channels by spatial beam shifting. This device uses group velocity effects similar to the superprism effect observed in photonic crystals, but shows larger and more controlled shifts including constant dispersion allowing for equidistant channel spacing. Experimentally, a nearly linear 100-μm shift is achieved between 827 and 841 nm. System considerations are discussed.
Keywords :
demultiplexing; optical communication equipment; optical multilayers; optical prisms; photonic crystals; wavelength division multiplexing; 827 to 841 nm; constant dispersion; controlled shifts; equidistant channel spacing; group velocity effects; nonperiodic thin-film stack; photonic crystals; spatial beam shifting; superprism effect; wavelength channels; wavelength demultiplexer; Demultiplexing; Dielectric thin films; Dispersion; Nonhomogeneous media; Optical control; Optical reflection; Photonic crystals; Transistors; Velocity control; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.815318
