Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering

2011 ◽  
Vol 98 (21) ◽  
pp. 211907 ◽  
Author(s):  
S. Brivio ◽  
D. Polli ◽  
A. Crespi ◽  
R. Osellame ◽  
G. Cerullo ◽  
...  
Keyword(s):  
Acoustic Phonon ◽  
Phonon Dispersion ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Stimulated Brillouin

scholarly journals Recent Progress in Distributed Brillouin Sensors Based on Few-Mode Optical Fibers

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2168
Author(s):  
Yong Hyun Kim ◽  
Kwang Yong Song
Keyword(s):  
Optical Fibers ◽  
Acoustic Phonon ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Spectral Shift ◽  
Modal Birefringence ◽  
Unique Reflection ◽  
Gain And Loss ◽  
Energy And Momentum ◽  
Stimulated Brillouin

Brillouin scattering is a dominant inelastic scattering observed in optical fibers, where the energy and momentum transfer between photons and acoustic phonons takes place. Narrowband reflection (or gain and loss) spectra appear in the spontaneous (or stimulated) Brillouin scattering, and their linear dependence of the spectral shift on ambient temperature and strain variations is the operation principle of distributed Brillouin sensors, which have been developed for several decades. In few-mode optical fibers (FMF’s) where higher-order spatial modes are guided in addition to the fundamental mode, two different optical modes can be coupled by the process of stimulated Brillouin scattering (SBS), as observed in the phenomena called intermodal SBS (two photons + one acoustic phonon) and intermodal Brillouin dynamic grating (four photons + one acoustic phonon; BDG). These intermodal scattering processes show unique reflection (or gain and loss) spectra depending on the spatial mode structure of FMF, which are useful not only for the direct measurement of polarization and modal birefringence in the fiber, but also for the measurement of environmental variables like strain, temperature, and pressure affecting the birefringence. In this paper, we present a technical review on recent development of distributed Brillouin sensors on the platform of FMF’s.

The damage of the optical components induced by the stimulated Brillouin scattering

2006 ◽  
Vol 15 (10) ◽  
pp. 2343-2346 ◽  
Author(s):  
Ge Zi-Ming ◽  
Lü Zhi-Wei ◽  
Cai Jun-Wei ◽  
Ao Shu-Yan ◽  
Luo You-Hua
Keyword(s):  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Optical Components ◽  
Stimulated Brillouin
Sign in / Sign up

Export Citation Format

Share Document