General IIR optical filter design for WDM applications using all-pass filters Academic Article uri icon


  • 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.

published proceedings

  • Journal of Lightwave Technology

altmetric score

  • 3

author list (cited authors)

  • Madsen, C. K.

citation count

  • 79

complete list of authors

  • Madsen, CK

publication date

  • June 2000