A novel optical arrangement for heterodyne detection of laser-induced gratings based on the use of a phase mask for both excitation and probe beams provides phase stability and control without the need for an active stabilization scheme. The arrangement greatly simplifies the laser-induced grating experiment. The performance of the technique in both transmission and reflection geometries is illustrated through measurements of bulk and surface acoustic waves generated by picosecond laser pulses.
© 1998 Optical Society of America
(050.0050) Diffraction and gratings : Diffraction and gratings
(300.2570) Spectroscopy : Four-wave mixing
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(300.6500) Spectroscopy : Spectroscopy, time-resolved
A. A. Maznev, K. A. Nelson, and J.A. Rogers, "Optical heterodyne detection of laser-induced gratings," Opt. Lett. 23, 1319-1321 (1998)