Open AccessUltra-sensitive chip scale Sagnac gyroscope based on periodically modulated coupling of a coupled resonator optical waveguide
Author(s) -
Christopher Sorrentino,
John R. E. Toland,
Christopher P. Search
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.000354
Subject(s) - resonator , gyroscope , sagnac effect , optics , coupling (piping) , physics , waveguide , sensitivity (control systems) , fibre optic gyroscope , resonance (particle physics) , transmission (telecommunications) , scale factor (cosmology) , modulation (music) , optoelectronics , materials science , optical fiber , acoustics , telecommunications , electronic engineering , particle physics , quantum mechanics , computer science , metallurgy , engineering , cosmology , metric expansion of space , dark energy
We analyze the sensitivity to inertial rotations Ω of a micron scale integrated gyroscope consisting of a coupled resonator optical waveguide (CROW). We show here that by periodic modulation of the evanescent coupling between resonators, the sensitivity to rotations can be enhanced by a factor up to 10(9) in comparison to a conventional CROW with uniform coupling between resonators. Moreover, the overall shape of the transmission through this CROW superlattice is qualitatively changed resulting in a single sharp transmission resonance located at Ω = 0s-1 instead of a broad transmission band. The modulated coupling therefore allows the CROW gyroscope to operate without phase biasing and with sensitivities suitable for inertial navigation even with the inclusion of resonator losses.