Accession Number:

AD1053662

Title:

Superradiance on the Millihertz Linewidth Strontium Clock Transition

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Department of Physics, University of Colorado Boulder United States

Report Date:

2016-10-14

Pagination or Media Count:

7.0

Abstract:

Laser frequency noise contributes a significant limitation to todays best atomic clocks. A proposed solution to this problem is to create a superradiant laser using an optical clock transition as its gain medium. This laser would act as an active atomic clock and would be highly immune to the fluctuations in reference cavity length that limit todays best lasers. We demonstrate and characterize superradiant emission from the millihertz linewidth clock transition in an ensemble of laser-cooled 87Sr atoms trapped within a high-finesse optical cavity. We measure a collective enhancement of the emission rate into the cavity mode by a factor of more than 10,000 compared to independently radiating atoms. We also demonstrate a method for seeding superradiant emission and observe interference between two independent transitions lasing simultaneously. We use this interference to characterize the relative spectral properties of the two lasing subensembles.

Subject Categories:

  • Optics
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE