Absolute absorption line-shape measurements at the shot-noise limit

Truong, Gar-Wing, Anstie, James D., May, Eric F., Stace, Thomas M. and Luiten, Andre N. (2012) Absolute absorption line-shape measurements at the shot-noise limit. Physical Review a, 86 3: 030501.1-030501.5.


Author Truong, Gar-Wing
Anstie, James D.
May, Eric F.
Stace, Thomas M.
Luiten, Andre N.
Title Absolute absorption line-shape measurements at the shot-noise limit
Journal name Physical Review a  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2012-09
Sub-type Article
DOI 10.1103/PhysRevA.86.030501
Volume number 86
Issue number 3
ISSN 1050-2947; 1094-1622
Start page 030501.1
End page 030501.5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2013
Language eng
Abstract Here, we report a measurement scheme for determining an absorption profile with an accuracy imposed solely by photon shot noise. We demonstrate the power of this technique by measuring the absorption of cesium vapor with an uncertainty at the 2-ppm level. This extremely high signal-to-noise ratio allows us to directly observe the homogeneous line-shape component of the spectral profile, even in the presence of Doppler broadening, by measuring the spectral profile at a frequency detuning more than 200 natural linewidths from the line center. We then use this tool to discover an optically induced broadening process that is quite distinct from the well-known power broadening phenomenon.
Keyword Frequency comb spectroscopy
Diode-laser
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article
Collections: School of Mathematics and Physics
Official 2013 Collection
 
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