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IEEE Journal of Lightwave Technology
Volume 18 Number 6, June 2000

Table of Contents for this issue

Complete paper in PDF format

General IIR Optical Filter Design for WDM Applications Using All-Pass Filters

C. K. Madsen

Page 860.

Abstract:

A general design algorithm is presented for infinite impulse response (IIR) bandpass and arbitrary magnitude response filters that use optical all-pass filters as building blocks. Examples are given for an IIR multichannel frequency selector, an amplifier gain equalizer, a linear square-magnitude response, and a multi-level response. Major advantages are the efficiency of the IIR filter compared to finite impulse response (FIR) filters, the simplicity of the optical architecture, and its tolerance for loss. A reduced set of unique operating states is discussed for implementing a reconfigurable multichannel selection filter.

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