Optical Resonators for Precision Metrological Devices

Dear Colleagues,

In the past decades, optical resonators have been demonstrated to be capable of measuring extremely small perturbations. By manipulating the dispersion spectrum experienced by the laser field inside an optical resonator, the sensitivity of such a device can be improved further. The white light cavity and the superluminal laser are two of the widely investigated dispersive optical resonators with the potential for measuring vanishingly small quantities such as gravitational wave and dark matter perturbations. The white light cavity is a passive resonator with anomalous dispersion, while the superluminal laser is the active version with a similar dispersion spectrum. The combination of an optical resonator with another optical system may yield extraordinary performance, such as a white light cavity incorporated with a Michelson interferometer for gravitational wave detection. Recently, efforts have been dedicated to improving sensitivity and bandwidth while reducing the dimensions of optical-resonator-based sensing devices. However, quantum noise analysis of active dispersive optical resonators, which is crucial for sensing devices, is still under investigation. Future advances would lead to more practical and miniaturized accelerometers, gyroscopes, and detectors for fundamental physics research. This Special Issue of Photonics will focus on the development of metrological devices with high precision utilizing active or passive optical resonators for inertial gyroscopes, gravitational wave detection, and dark matter search. Researchers are invited to submit their contributions to this Special Issue.

Dr. Zifan Zhou
Guest Editor

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