Title

Flat-top narrow-band spectral response obtained from cascaded resonant grating reflection filters

Authors

Authors

D. K. Jacob; S. C. Dunn;M. G. Moharam

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Optics

Keywords

Optics

Abstract

Cascaded identical resonant grating reflection filters are shown to exhibit flattened spectral responses when the individual filter elements are cascaded 7, out of phase. Off resonance, the net response of a cascaded arrangement is given approximately by the sum of the individual filter responses. Cascading filters pi out of phase thus result in a reduction in the off-resonance reflection levels and correspondingly an increase in the spectral bandpass ratio. The spectral bandpass ratio is a figure of merit used to gauge the flatness of a response and is defined as the ratio of the linewidth at an efficiency of 90% to the linewidth at an efficiency of 10%. Cascading two and three filters in this manner results in respective increases in the spectral bandpass ratio of three times and more than five times that of a single filter. (C) 2002 Optical Society of America.

Journal Title

Applied Optics

Volume

41

Issue/Number

7

Publication Date

1-1-2002

Document Type

Article

Language

English

First Page

1241

Last Page

1245

WOS Identifier

WOS:000174095600004

ISSN

1559-128X

Share

COinS