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Silicon photonics thermal phase shifter with reduced temperature range

United States Patent

December 17, 2013
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
Optical devices, phased array systems and methods of phase-shifting an input signal are provided. An optical device includes a microresonator and a waveguide for receiving an input optical signal. The waveguide includes a segment coupled to the microresonator with a coupling coefficient such that the waveguide is overcoupled to the microresonator. The microresonator receives the input optical signal via the waveguide and phase-shifts the input optical signal to form an output optical signal. The output optical signal is coupled into the waveguide via the microresonator and transmitted by the waveguide. At an operating point of the optical device, the coupling coefficient is selected to reduce a change in an amplitude of the output optical signal and to increase a change in a phase of the output optical signal, relative to the input optical signal.
Lentine; Anthony L. (Albuquerque, NM), Kekatpure; Rohan D. (Albuquerque, NM), DeRose; Christopher (Albuquerque, NM), Davids; Paul (Albuquerque, NM), Watts; Michael R. (Hingham, MA)
Sandia Corporation (Albuquerque, NM)
13/ 368,141
February 7, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was developed under Contract DE-AC04-94AL85000 between Sandia Corporation and the U.S. Department of Energy. The U.S. Government has certain rights in this invention.