Compact and fault-tolerant photonic crystal add drop filter

Ségolène Olivier (1) , Claude Weisbuch (1) , Henri Benisty (2)

1 LPMC - Laboratoire de physique de la matière condensée
2 Laboratoire Charles Fabry de l'Institut d'Optique / Naphel

We propose an add-drop filter consisting of two adjacent waveguides carved into a two-dimensional photonic crystal that is etched through a standard guiding structure. This filter is based on distributed energy transfer via the frequency-selective intermediate conversion of the fundamental guided mode to a high-order low-group-velocity mode. This geometry circumvents the fabrication sensitivity on the single-hole scale of previous cavity-based designs. Combining distributed energy transfer and reduced group velocity preserves compactness. The design is analytically optimized with a coupled-mode approach.

Domains: Optics [physics.optics]

Ségolène Olivier, Claude Weisbuch, Henri Benisty. Compact and fault-tolerant photonic crystal add drop filter. Optics Letters, 2003, 28 (22), pp.2246-2248. ⟨10.1364/OL.28.002246⟩. ⟨hal-00878523⟩