Integrated reference cavity with dual-mode optical thermometry for frequency correction
Abstract
Photonic integrated resonators have advantages over traditional benchtop cavities in terms of size, weight, and cost with the potential to enable applications that require spectrally pure light. However, integrated resonators suffer from temperature-dependent frequency variations and are sensitive to external environmental perturbations, which hinders their usage in precision frequency applications. One solution is to use interrogation of the cavity temperature through dual-mode optical thermometry (DMOT) by measuring the shift of the resonance frequency difference between two polarization or optical frequency modes. Yet this approach has only been demonstrated in bulk-optic whispering gallery mode and fiber resonators. In this paper, we implement dual-mode optical thermometry in an ultra-high Q integrated silicon nitride resonator. A dual-mode resonance frequency difference temperature sensitivity of 188 ± 15 M H z / K is measured. We demonstrate feedforward DMOT frequency correction that, under an applied external temperature ramp, is able to reduce the optical frequency change to 0.31 kHz/s as compared to an uncorrected 10.03 kHz/s, a factor of 30 × reduction. These results show promise for on-chip frequency correction solutions for quantum, metrology, atomic, and coherent optical communications applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 17, 2021
- Source ID
- 10.1364/optica.432194
Entities
People
- Andrei Isichenko
- Chad Fertig
- Chad W. Hoyt
- Daniel Blumenthal
- Kaikai Liu
- Mark W. Harrington
- Peter T Rakich
- Qiancheng Zhao
- Ryan O Behunin
- Scott B. Papp
Organizations
- ARPA-E
- Defense Advanced Research Projects Agency
- Honeywell Aerospace
- National Institute of Standards and Technology
- Northern Arizona University
- University of California, Santa Barbara
- Yale University