Accession Number:

ADA625318

Title:

A Superradiant Laser: Toward mHZ Linewidth Lasers

Descriptive Note:

Final rept. 15 Aug 2011-14 May 2012

Corporate Author:

COLORADO UNIV AT BOULDER

Personal Author(s):

Report Date:

2014-12-03

Pagination or Media Count:

9.0

Abstract:

We demonstrated that an optical laser can operate with less than 1 photons on average inside the cavity while also obtaining significant spectral narrowing of the emitted light relative to the single atom transition linewidth. We further explored the power output properties and threshold conditions of this laser. We made direct measurements that showed that the lasing frequency can be made greater than 10000 times less sensitive to the resonance frequency of the optical cavity than is the case for normal lasers or for passive optical reference cavities. Such a large reduction in sensitivity would essentially remove both thermal and technical mirror vibrations as a limitation on laser linewidth. Other studies included how phase information can be stored and manipulated inside of our laser, such that it may be possible to have both an active laser and a passive Ramsey-like sensor in the same setup. We considered the fundamental limits on the atomic quantum information that can be extracted from the laser light and found that it corresponded closely to the fundamental atomic standard quantum limit on phase estimation.

Subject Categories:

  • Lasers and Masers
  • Electricity and Magnetism
  • Fiber Optics and Integrated Optics
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE