A packaged, fiber-coupled waveguide-enhanced Raman spectroscopic sensor
Name
oe-28-10-14963.pdf
Description
Published version
Size
980.9 KB
Format
Adobe PDF
Checksum (MD5)
99d3d528847de9ded869725504e36b1d
Author(s)
Kita, Derek M.
Michon, Jerome
Hu, Juejun
Date Issued
May 2020
Journal
Optics Express
Publisher
The Optical Society
Citation
Kita, Derek M. et al., "A packaged, fiber-coupled waveguide-enhanced Raman spectroscopic sensor." Optics Express 28, 10 (May 2020): 14963-72 doi. 10.1364/OE.392486 ©2020 Authors
Version
Final published version
Abstract
Waveguide-enhanced Raman spectroscopy (WERS) is a promising technique for sensitive and selective detection of chemicals in a compact chip-scale platform. Coupling light on and off the sensor chip with fibers however presents challenges because of the fluorescence and Raman background generated by the pump light in the fibers; as a result all WERS demonstrations to date have used free-space coupling via lenses. We report a packaged, fiber-bonded WERS chip that filters the background on-chip through collection of the backscattered Raman light. The packaged sensor is integrated in a ruggedized flow cell for reliable measurement over arbitrary time periods. We also derive the figures of merit for WERS sensing with the backscattered Raman signal and compare waveguide geometries with respect to their filtering performance and signal to noise ratio. ©2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
MIT Materials Research Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1364/OE.392486
