Title :
Symmetry-selecting gratings and their applications
Author :
Tomljenovic-Hanic, S.
Author_Institution :
Res. Sch. of Phys. Sci., Australian Nat. Univ., Canberra, ACT, Australia
fDate :
29 June-3 July 2003
Abstract :
The basic idea behind a symmetry-selecting grating is to replace a grating written over the entire core cross-section of a waveguide with a grating that is written only over a part of the core. Gratings with a particular symmetry in the horizontal direction can be symmetry-selective, reflecting the modes with that particular symmetry. Here a new type of grating-the fractional core gratings-is proposed and their potential applications to single-, two- and three-wavelength add/drop wavelength filters is discussed and their performance quantified.
Keywords :
Bragg gratings; coupled mode analysis; finite difference methods; optical communication equipment; optical planar waveguides; optical waveguide filters; refractive index; add/drop wavelength filters; blazed grating; coupled mode theory; fractional core gratings; fundamental mode; horizontal direction symmetry; hybrid FDM/MFDM; modal field shapes; refractive index distribution; step profile rectangular waveguides; symmetry-selecting grating; Bragg gratings; Channel spacing; Fiber gratings; Modal analysis; Optical fiber devices; Optical reflection; Optical waveguides; Rectangular waveguides; Slabs; Wavelength division multiplexing;
Conference_Titel :
Transparent Optical Networks, 2003. Proceedings of 2003 5th International Conference on
Print_ISBN :
0-7803-7816-4
DOI :
10.1109/ICTON.2003.1263181
