ABSTRACT
This chapter describes a synthesis for optical filters based on the digital filter technique following that of a Chebyshev filter type. It provides an effective and versatile synthesis method based on the digital signal processing technique is proposed for the design of tunable optical waveguide filters with variable bandwidths and tunable center frequencies and arbitrary infinite impulse response (IIR) characteristics. The chapter also describes the transfer function of an IIR digital filter to be synthesized using optical waveguide components. It presents the basic building blocks, namely, all-pole filters and the all-zero filters of the tunable optical filter. The chapter provides the proposed synthesis method of the tunable optical filters using the digital signal processing technique, and the design of second-order Butterworth bandpass and bandstop tunable optical filters. It also presents the basic building blocks, namely, the first-order all-pole optical filter and the first-order all-zero optical filter of the tunable optical filter.
