OSA's Digital Library

Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 36, Iss. 3 — Feb. 1, 2011
  • pp: 346–348

Improved sensitivity of intensity-modulated spectroscopy using correlative signal processing

Vahid Ataie and George Papen  »View Author Affiliations

Optics Letters, Vol. 36, Issue 3, pp. 346-348 (2011)

View Full Text Article

Enhanced HTML    Acrobat PDF (345 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Frequency-modulation (FM) spectroscopy is known to be a sensitive spectroscopic technique capable of accurately measuring the frequency dependence of the absorption and index of refraction of narrow spectral features. The absorption and index of refraction are coupled by a form of the Kramers–Kronig (K-K) relations, and both components provide information about the spectral feature. In this Letter, we propose a processing technique based on fitting the data to a complex signal model derived from the K-K relation. By using this complex constraint and only processing a single quadrature, our model predicts significant improvement in the minimum detectable absorption compared with conventional FM spectroscopy.

© 2011 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(300.6360) Spectroscopy : Spectroscopy, laser
(300.6380) Spectroscopy : Spectroscopy, modulation

ToC Category:

Original Manuscript: October 14, 2010
Manuscript Accepted: December 20, 2010
Published: January 25, 2011

Vahid Ataie and George Papen, "Improved sensitivity of intensity-modulated spectroscopy using correlative signal processing," Opt. Lett. 36, 346-348 (2011)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. G. C. Bjorklund, M. D. Levenson, W. Lenth, and C. Ortiz, Appl. Phys. B 32, 145 (1983). [CrossRef]
  2. F. Devaux, Y. Sorel, and J. Kerdiles, J. Lightwave Technol. 11, 1937 (1993). [CrossRef]
  3. J. Goodman, Statistical Optics (Wiley, 2000).
  4. M. Gehrtz, G. C. Bjorklund, and E. A. Whittaker, J. Opt. Soc. Am. B 2, 1510 (1985). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited