Broadband photon-counting Raman spectroscopy in short optical waveguides

M. J. Collins*, A. C. Judge, A. S. Clark, S. Shahnia, E. C. Mägi, M. J. Steel, C. Xiong, B. J. Eggleton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
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We present a method of directly measuring the spontaneous Raman scattering in optical waveguides in an alignment-free setup. Using a pulsed laser, liquid-crystal-on-silicon spatial light modulator and single-photon detector, we create a broadband photon-counting Raman spectrometer. The temperature and polarization dependence are characterized in an As2S3 amorphous glass fiber for a Stokes detuning range of 1 to 9 THz from the pump frequency. We fit our experimental data with a theoretical model and extract the Raman-gain spectrum and compare to free-space measurements of bulk As 2S3. The sensitivity of the method in principle allows direct characterization of chip-scale nanophotonic devices.

Original languageEnglish
Article number211110
Pages (from-to)211110-1-211110-4
Number of pages4
JournalApplied Physics Letters
Issue number21
Publication statusPublished - 19 Nov 2012

Bibliographical note

Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters 101(21), and may be found at (


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