High-speed Brillouin imaging via continuous-wave stimulated Brillouin scattering (Conference Presentation)

Itay Remer; Alberto Bilenca

doi:10.1117/12.2251967

24 April 2017 High-speed Brillouin imaging via continuous-wave stimulated Brillouin scattering (Conference Presentation)

Itay Remer, Alberto Bilenca

Author Affiliations +

Proceedings Volume 10067, Optical Elastography and Tissue Biomechanics IV; 100670H (2017) https://doi.org/10.1117/12.2251967
Event: SPIE BiOS, 2017, San Francisco, California, United States

Abstract

Brillouin spectroscopy is a noncontact technique for characterizing the mechanical properties of materials. Typically, Brillouin spectrometers have been realized using scanning Fabry–Perot spectrometers that measure, with long acquisition times, spontaneous Brillouin scattering from the samples. In the last few years, the use of virtually imaged phase array (VIPA) etalons for constructing Brillouin spectrometers has enabled to acquire spontaneous Brillouin spectra <1,000-fold faster than with scanning Fabry–Perot spectrometers, opening up new means for high-speed Brillouin analysis of materials. In this talk, we will present a different approach for high-speed Brillouin material analysis. The method uses continuous-wave stimulated Brillouin scattering (CW-SBS) to measure stimulated Brillouin gain (SBG) spectra of materials at <100 milliseconds – up to 100-fold faster than with existing CW-SBS spectrometers. The SBS spectrometer comprises two nearly counter-propagating single-frequency lasers at 780 nm whose frequency detuning is scanned through the material Brillouin shift. SBG is detected via an ultra-narrowband hot rubidium-85 vapor notch filter and a lock-in detector, resulting in an improved signal-to-noise ratio that enables to significantly shorten acquisition times. We will show that this improvement, combined with micrometer-step-size spatial scanning of the sample, provides precise Brillouin profiles of layered liquids at 30-milliseconds pixel-dwell-time, facilitating Brillouin profilometry analysis of materials at high speed.

Conference Presentation

Citation Download Citation

Itay Remer and Alberto Bilenca "High-speed Brillouin imaging via continuous-wave stimulated Brillouin scattering (Conference Presentation)", Proc. SPIE 10067, Optical Elastography and Tissue Biomechanics IV, 100670H (24 April 2017); https://doi.org/10.1117/12.2251967

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Spectrometers

Scattering

Continuous wave operation

Fabry–Perot interferometers

Imaging arrays

Laser scattering

Linear filtering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years