US 12,449,713 B2
Low frequency wave generation via optical frequency division
Yun Zhao, New York, NY (US); Jae K Jang, New York, NY (US); Yoshitomo Okawachi, River Edge, NJ (US); Bok Young Kim, New York, NY (US); Alexander L Gaeta, New York, NY (US); and Michal Lipson, New York, NY (US)
Assigned to The Trustees of Columbia University in the City of New York, New York, NY (US)
Filed by The Trustees of Columbia University in the City of New York, New York, NY (US)
Filed on Apr. 28, 2023, as Appl. No. 18/309,572.
Claims priority of provisional application 63/337,237, filed on May 2, 2022.
Prior Publication US 2024/0402571 A1, Dec. 5, 2024
Int. Cl. G02F 1/39 (2006.01); G02F 1/01 (2006.01)
CPC G02F 1/395 (2013.01) [G02F 1/0147 (2013.01); G02F 2203/15 (2013.01); G02F 2203/21 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for generating tunable, low frequency signals, comprising:
receiving a light input on a device, wherein the light input comprises a plurality of frequencies, and the device comprises a first waveguide in optical communication with a first ring resonator, and a second waveguide in optical communication with a second ring resonator;
pumping the light input through the first waveguide to generate a first frequency and a second frequency via optical parametric oscillation (OPO);
pumping the first frequency and the second frequency through the second waveguide to optically synchronize the frequencies via optical frequency division (OFD);
generating a synchronized low frequency signal; and
thermally tuning at least one of the first ring resonator and the second ring resonator to reduce noise associated with the low frequency signal.