Frequency-modulated stimulated Brillouin spectroscopy in crystals

Toshiaki Sonehara, Yusaku Konno, Hitomi Kaminaga, Seishiro Saikan, Seigo Ohno

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We have developed a Brillouin spectrometer based on frequency modulation (FM) spectroscopy in order to enhance the detection sensitivity and to detect separately the real and imaginary parts of the Brillouin spectrum. With this spectrometer, we have measured Brillouin spectra at room temperature in a variety of single crystals including SiO2, CaF2, LiNbO3, deuterated L-arginine phosphate, PbMoO4, TeO2, langatate (La3Ta0.5Ga5.3 Al0.2O14), and KRS-5. To determine the Brillouin linewidth and shift from the observed FM spectrum, we have derived a spectral formula for the FM-stimulated Brillouin spectrum by taking into account several contributions from both electrostrictive and absorptive Brillouin scattering and polarization ellipticity of pump or probe waves. This formula reproduces the observed FM Brillouin spectra quite well.

Original languageEnglish
Pages (from-to)1193-1198
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Issue number5
Publication statusPublished - 2007 May


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