Window functions for ideal response in distributed feedback reflection filters

Author

Little, Brent E. ; Wu, Chi

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA

Volume

9

Issue

1

fYear

1997

Firstpage

76

Lastpage

78

Abstract

The wavelength filter synthesis problem in distributed feedback reflection filters is solved using variational optimization. Near ideal response is achieved by using appropriate window functions. These responses have the narrowest stopband widths for a particular side-lobe suppression level. In particular, an analytic design formula approximating these ideal windowing functions is given for filters requiring -30 dB to -60 dB sidelobe suppression.

Keywords

coupled mode analysis; optical communication equipment; optical design techniques; optical feedback; optical waveguide filters; optimisation; wavelength division multiplexing; WDM; analytic design formula; appropriate window functions; distributed feedback reflection filters; ideal response; ideal windowing functions; narrowest stopband widths; near ideal response; side-lobe suppression level; sidelobe suppression; variational optimization; wavelength filter design; wavelength filter synthesis problem; window functions; Convergence; Design optimization; Distributed feedback devices; Fabrication; Filters; Gratings; Lithography; Propagation constant; Reflection; Shape;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.554503

Filename

554503