Automatic Wavelength Tuning of Series-Coupled Vernier Racetrack   Resonators on SOI
  Using in-resonator photoconductive heaters to both sense and control the intra-cavity light intensity of microring resonators, automatic tuning of a silicon-on-insulator two-ring Vernier filter is demonstrated across the entire C-band. 
Hasitha Jayatilleka, Robert Boeck, Kyle Murray, Jonas Flueckiger,   Lukas Chrostowski, Nicolas A. F. Jaeger and Sudip Shekhar
physics.optics