An effective and exact synthesis technique for the design of parallel-coupled ring-resonator filters with a maximally flat stop-band characteristic of any order is presented. Simple closed-form formulas determine the <i>Q</i> factor of each resonator and the coupling coefficients. The performances of these filters are discussed for their applications as interleavers and channel-dropping filters in wavelength-division multiplexing systems.
© 2001 Optical Society of America
(060.4230) Fiber optics and optical communications : Multiplexing
(130.1750) Integrated optics : Components
(230.3120) Optical devices : Integrated optics devices
(230.5750) Optical devices : Resonators
Andrea Melloni, "Synthesis of a parallel-coupled ring-resonator filter," Opt. Lett. 26, 917-919 (2001)