We describe theoretical and experimental demonstration for optical detection of ultrasound using a spectral hole engraved in cryogenically cooled rare-earth ion-doped solids. Our method utilizes the dispersion effects due to the spectral hole to perform phase-to-amplitude modulation conversion. Like previous approaches using spectral holes, it has the advantage of detection with large étendue. The method also has the benefit that high sensitivity can be obtained with moderate absorption contrast for the spectral holes.
© 2010 Optical Society of America
Original Manuscript: May 21, 2010
Revised Manuscript: July 5, 2010
Manuscript Accepted: July 6, 2010
Published: August 3, 2010
Jian Wei Tay, Patrick M. Ledingham, and Jevon J. Longdell, "Coherent optical ultrasound detection with rare-earth ion dopants," Appl. Opt. 49, 4331-4334 (2010)