Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Sub-Doppler dispersion and noise-immune cavity-enhanced optical heterodyne molecular spectroscopy revised

Not Accessible

Your library or personal account may give you access

Abstract

An expression for the peak-to-peak sub-Doppler optical phase shift of two counterpropagating modes of light, to which the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) dispersion signal is proportional, valid for arbitrary degree of saturation, is derived. For low degrees of saturation it agrees with the expression for weakly saturating (ws) conditions, [(1+S)12(1+2S)12]α02, where S is the degree of saturation and α0 is the unsaturated peak absorption. However, the new expression, which can be written as 0.45S(1+S)1α02, does not predict a distinct maximum as the ws expression does; instead it predicts an optical phase shift that increases monotonically with S and levels off to 0.45α02 for large S. This alters the optimum conditions for the sub-Doppler NICE-OHMS technique and improves its shot-noise-limited detectability. The new expression is based upon the same explicit assumptions as the ws expression but not the Kramers–Kronig relations, which are not valid for nonlinear responses, and is supported by experimental results up to S=100. The new expression is expected to be valid for all techniques measuring sub-Doppler dispersion signals.

© 2008 Optical Society of America

Full Article  |  PDF Article
More Like This
Doppler-broadened noise-immune cavity-enhanced optical heterodyne molecular spectrometry signals from optically saturated transitions under low pressure conditions

Aleksandra Foltynowicz, Weiguang Ma, Florian M. Schmidt, and Ove Axner
J. Opt. Soc. Am. B 25(7) 1156-1165 (2008)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (28)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved