Ultranarrow Linewidth Photonic-Atomic Laser

Wei Zhang*, Liron Stern, David Carlson, Douglas Bopp, Zachary Newman, Songbai Kang, John Kitching, Scott B. Papp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


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 (Formula presented.) at an averaging time of 20 millisecond, (Formula presented.) 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.

Original languageAmerican English
Article number1900293
JournalLaser and Photonics Reviews
Issue number4
StatePublished - 1 Apr 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • laser optics
  • laser stabilization
  • optical resonators


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