US 12,292,600 B2
Control of resonant optical evanescent coupling between waveguides and resonators
Dashiell L. Vitullo, Rockville, MD (US); Daniel E. Jones, Nottingham, MD (US); Michael Brodsky, Millburn, NJ (US); Michael Sumetsky, Birmingham (GB); and Sajid Zaki, Birmingham (GB)
Assigned to The United States of America as represented by the Secretary of the Army, Washington, DC (US)
Filed by U.S. Army DEVCOM, Army Research Laboratory, Adelphi, MD (US)
Filed on Aug. 18, 2022, as Appl. No. 17/890,626.
Claims priority of provisional application 63/234,258, filed on Mar. 2, 2024.
Prior Publication US 2022/0390677 A1, Dec. 8, 2022
Int. Cl. G02B 6/293 (2006.01)
CPC G02B 6/29341 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of determining evanescent coupling parameters of a waveguide coupled to a resonator, the waveguide configured to provide a field having a length scale w that is smaller than a characteristic length xc of a field of the resonator, the method comprising:
responsive to data indicative of a Jones matrix spectrum of the coupled waveguide and resonator at each of multiple contact positions x along the resonator with fixed z, calculating a transmission spectrum of the coupled waveguide and resonator at each of the multiple contact positions x;
generating a 2D spectrogram by combining the calculated transmission spectrum of the coupled waveguide and resonator at each of the multiple contact positions x;
estimating resonator parameters by fitting a resonator model to a 1D axial resonance spectrum derived from the 2D spectrogram;
fitting a coupled WG/resonator model to a subset of 2D spectrogram data to estimate coupling parameters using estimated resonator parameters.