Accession Number:

ADA633809

Title:

A high stability optical frequency reference based on thermal calcium atoms

Descriptive Note:

Conference paper

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Report Date:

2011-05-21

Pagination or Media Count:

5.0

Abstract:

Here we report an imprecision below 10-14 with a simple, compact optical frequency standard based upon thermal calcium atoms. Using a Ramsey-Bord spectrometer we excite features with linewidths less than 5 kHz for the 1S0-3P1 intercombination line at 657 nm. We have measured a fractional frequency instability below 6 x 10-15 at 1 s, with good prospects for still quieter performance. The key remaining issue for this standard is how well first- and secondorder Doppler drifts can be suppressed. Due to its experimental simplicity such a system could find application as a less accurate, but high stability reference for commercial applications.

Subject Categories:

  • Electricity and Magnetism
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE