A novel reconfigurable fibre based tuneable filter is proposed. The module relies on a cascaded connection of Mach-Zehnders and an amplified fibre ring resonator. MHz range adjustable FHWM bandwidths and high crosstalk are ...

We propose a new synthesis method for the implementation of infinite impulse response filters, using a Sagnac interferometer within a ring resonator. This structure permits the synthesis of second-order optical functions ...

Abstract. A new efficient method for implementing narrowband FlR jilters is presented. The method is based on an lnterpolated jilter (lFlR) structure and a cascade of comb and integrator (ClC) structures. The novelty ...

Measurements on a passive optical fibre tunable filter are presented. The device is based on a loop mirror in a ring resonator. The loop mirror allows tuning by changing the coupling coefficient of a coupler. The novel ...

IIR filters are implemented using the recursion. Are analog and digital filters that use a mathematical strategy for achieving a faster roll off by allowing ripple in the frequency response (they use Chebyshev polynomials).

Moving average is an exceptionally good smoothing filter (the action in the time domain), but an exceptionally bad low-pass filter (the action in the frequency domain).