Abstract

This paper contains a discussion of the relation between the angular distributions of the coherently emitted radiation and the angular distribution of the incident beams in a degenerate four-wave mixing experiment, when two of the input beams are derived from the same laser source. The objective of the discussion is to obtain beam configurations that permit the use of such spectroscopic techniques when good spatial resolution is required so that the conventional collinear phase matching geometry is inappropriate. Two different configurations are indeed obtained and experimentally demonstrated that have, in the worst direction (longitudinal), spatial resolution of the order of 1 mm, with beam apertures comparable with those used in the standard collinear experiments and without the complicating requirement of two distinct pump beams.

© 1981 Optical Society of America

Imaging of trace species distributions by degenerate four-wave mixing: diffraction effects, spatial resolution, and image referencing

Paul Ewart, Peter G. R. Smith, and Richard B. Williams
Appl. Opt. 36(24) 5959-5968 (1997)

Broadband single-pulse CARS spectra in a fired internal combustion engine

David Klick, K. A. Marko, and L. Rimai
Appl. Opt. 20(7) 1178-1181 (1981)

Spatial resolution for two-beam spectroscopy: a new mechanism

Barton D. Billard
Appl. Opt. 20(9) 1668-1675 (1981)

Diagnostic study of four-wave-mixing-based electric-field measurements in high-pressure nitrogen plasmas

Walter R. Lempert, Sean P. Kearney, and Edward V. Barnat
Appl. Opt. 50(29) 5688-5694 (2011)

Annular phase-matched dual-pump coherent anti-Stokes Raman spectroscopy system for the simultaneous detection of nitrogen and methane

Stephen M. Green, Paul J. Rubas, Mark A. Paul, James E. Peters, and Robert P. Lucht
Appl. Opt. 37(9) 1690-1701 (1998)