In this paper, we apply transformation optics to design an optical spatial interferometer. The transformation equations are described and two-dimensional finite element simulations are presented to numerically confirm the functionality of the device...

We report high performance Bragg gratings in As2S3 chalcogenide glass rib waveguides, written

with a modified Sagnac interferometer for the first time. Grating growth dynamics obtained from an in-situ monitoring system are presented...