Patent ID: 7412144

Claim:
A waveguide modulator comprising: a waveguide having a core having a linear refractive index of n 0 ; a plurality of cladding layers repeated in periodic patterns with a first layer of each respective periodic pattern having a linear refractive index of n 1 , and a second layer of each respective periodic pattern having a linear refractive index of n 2 , said second layer of each respective periodic pattern being further from the core than said first layer of each respective periodic pattern, said second layer of each respective periodic pattern having a linear refractive index which is substantially equal to the linear refractive index of said core, said plurality of cladding layers comprise an upper cladding region and a lower cladding region, said core being positioned between said upper cladding region and said lower cladding region; a first electrode connecting to said upper cladding region and a second electrode connecting to said lower cladding region for providing a voltage for purposes of modulating a light wave propagating through said core; and wherein said upper cladding region comprises a first portion of said plurality of cladding layers repeated in periodic patterns with the first layer of each respective periodic pattern having the linear refractive index of n 1 and the second layer of each periodic pattern of said first portion of cladding layers having the linear refractive index of n 2 , said lower cladding region comprises a second portion of said plurality of cladding layers repeated in periodic patterns with the first layer of each respective periodic pattern having the linear refractive index of n 1 , and the second layer of each periodic pattern of said second portion of cladding layers having the linear refractive index of n 2 .