Title :
Window Functions for Ideal Responce in Distributed Feedback Reflection Filters
Author :
Little, Brent E. ; Wu, Chi
Author_Institution :
Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge MA 02931 USA
Abstract :
The wavelength filter synthesis problem in distributed feedback reflection filters is solved using variational optimization. Near ideal response is achievefi 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 theory; optimization.; wavelength titters; Convergence; Design optimization; Distributed feedback devices; Fabrication; Filters; Gratings; Lithography; Propagation constant; Reflection; Shape;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.1997.554501
