A molecular optical clock at RISE

Purpose and goal

The project aims to develop a compact, highly stable and portable optical clock based on molecular iodine transitions, which have long been recognized as reliable wavelength references and secondary standards for the definition of the second. Using advanced laser technology and molecular spectroscopy, the project aims to create a portable quantum device with performance that surpasses compact cesium atomic clocks and can compete with hydrogen masers.

Expected effects and result

An optical molecular clock will be developed, this optical frequency reference will be used as a primary or redundant system for timekeeping and as a practical realization of the meter at the wavelength of 532 nm. The advancement of this technology is twofold: it will improve our capabilities in basic research and will construct a portable quantum device that will improve our national infrastructure.

Planned approach and implementation

The overall goal is to develop a new optical frequency standard. The explicit goals of this project are listed below: • Develop the optical reference based on an iodine vapor cell. • Build a fiber-based self-referenced frequency comb and the optical division system. • Validate the system by comparing it to a frequency standard maintained by our NMI to characterize its accuracy and uncertainty.