Ultranarrow Linewidth Photonic‐Atomic Laser
Abstract
Lasers with high spectral purity can enable a diverse application space, including precision spectroscopy, coherent high‐speed communications, physical sensing, and manipulation of quantum systems. Already, meticulous design and construction of bench Fabry–Perot cavities has made possible dramatic achievements in active laser‐linewidth reduction, predominantly for optical‐atomic clocks. Yet, there is increasing demand for miniaturized laser systems operating with high performance in ambient environments. Here, a compact and robust photonic‐atomic laser comprising a 2.5 centimeter long, 20 000 finesse, monolithic Fabry–Perot cavity integrated with a micromachined rubidium vapor cell is presented. By leveraging the short‐time frequency stability of the cavity and the long‐time frequency stability of atoms, an ultranarrow‐linewidth laser that enables integration for extended measurements is realized. Specifically, the laser supports a fractional‐frequency stability of at an averaging time of 20 millisecond, at 300 second, an integrated linewidth of 25 Hz that results from thermal noise, frequency noise floor as low as 0.06 Hz2 Hz−1, and a passive vibration immunity as low as 10−10 g−1. The present work explores hybrid laser systems with monolithic photonic and atomic packages based on physical design.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 01, 2020
- Source ID
- 10.1002/lpor.201900293
Entities
People
- David R Carlson
- Douglas Bopp
- John E. Kitching
- Liron Stern
- Scott B. Papp
- Songbai Kang
- Wei Zhang
- Zachary Newman
Organizations
- Air Force Office of Scientific Research
- National Institute of Standards and Technology
- University of Colorado