Resonators liberated from dispersion: broad periodic waveguides operating at the Littrow regime

Henri Benisty (1) , Nikolay Piskunov (1)

1 Laboratoire Charles Fabry / Naphel

We show that broad periodic waveguides operating at the Littrow regime can form series of modes with a negative dispersion in their spacing (dFSR/dω > 0, FSR = Free Spectral Range), thanks to samples with extended range. We provide an analysis of this experimental FSR based on a nearly analytical consideration. For frequency combs, a uniform FSR (dispersion free) can be attained at any desirable frequency in the range λ = 1.5-4.3 μm for a silicon resonator.

Keywords: broad waveguides; anomalous dispersion; dispersion compensation; grating coupling; broad waveguides

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Henri Benisty, Nikolay Piskunov. Resonators liberated from dispersion: broad periodic waveguides operating at the Littrow regime. 15th International Conference on Transparent Optical Networks (ICTON), Jun 2013, Cartagena, Spain. ⟨10.1109/ICTON.2013.6602773⟩. ⟨hal-00857670⟩