Time-resolved, dual heterodyne phase collection transient grating spectroscopy
Name
Short_Time-resolved.pdf
Size
1.64 MB
Format
Adobe PDF
Checksum (MD5)
7de1372a65599df950c1fd337aaf2ad8
Author(s)
Dennett, Cody Andrew
Short, Michael P
Date Issued
May 2017
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Dennett, Cody A., and Michael P. Short. “Time-Resolved, Dual Heterodyne Phase Collection Transient Grating Spectroscopy.” Applied Physics Letters 110, no. 21 (May 22, 2017): 211106.
Version
Final published version
Abstract
The application of optical heterodyne detection for transient grating spectroscopy (TGS) using a fixed, binary phase mask often relies on taking the difference between signals captured at multiple heterodyne phases. To date, this has been accomplished by manually controlling the heterodyne phase between measurements with an optical flat. In this letter, an optical configuration is presented which allows for collection of TGS measurements at two heterodyne phases concurrently through the use of two independently phase controlled interrogation paths. This arrangement allows for complete, heterodyne amplified TGS measurements to be made in a manner not constrained by a mechanical actuation time. Measurements are instead constrained only by the desired signal-to-noise ratio. A temporal resolution of between 1 and 10 s, demonstrated here on single crystal metallic samples, will allow TGS experiments to be used as an in-situ, time-resolved monitoring technique for many material processing applications.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/1.4983716
