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

    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