Very low crosstalk 1×2 digital optical switchintegrated with variable optical attenuators

Abstract
A novel digital thermo-optic switch based on a polymer waveguide has been demonstrated. The proposed switch consists of a conventional 1×2 digital optical switch and compact variable optical attenuators, with both elements integrated in series. The switches exhibit very low crosstalk values of –42 and –40 dB, and the switching power is ~170 mW at 1.55 µm.