Backscatter in integrated optical waveguides and circuits

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Abstract
Backscatter in integrated optical waveguides is responsible of losses and distortion of the spectral circuit response. In this contribution we present measurements of the backscattered power from medium and high index contrast waveguides and an equivalent circuit describing the statistical behavior of such effect is proposed. The measurements are carried out with a cavitometric technique allowing to space resolve the local backreflection distributed along the waveguide. The equivalent circuit is composed by an ideal waveguide with a central lumped reflector owning a random phase. We investigated the spectral response of simple circuits and ring resonators, both numerically and experimentally.

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