Abstract

We designed a microwave (MW) photonics phase shifter, consisting of a Fabry–Perot filter, a phase modulation region (PMR), and distributed Bragg reflectors, in a silicon-on-insulator rib waveguide. The thermo-optics effect was employed to tune the PMR. It was theoretically demonstrated that the linear MW phase shift of $0-2\pi$ could be achieved by a refractive index variation of $0-9.68\times {10}^{-3}$ in an ultrawideband (about $38\mathrm{GHz}-1.9\mathrm{THz}$), and the corresponding tuning resolution was about $6.92°/°\mathrm{C}$. The device had a very compact size. It could be easily integrated in silicon optoelectronic chips and expected to be widely used in the high-frequency MW photonics field.

© 2010 Optical Society of America

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