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

doi:10.1063/1.4767220

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 journal › Article › peer-review

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Abstract

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 language	English
Article number	211110
Pages (from-to)	211110-1-211110-4
Number of pages	4
Journal	Applied Physics Letters
Volume	101
Issue number	21
DOIs	https://doi.org/10.1063/1.4767220
Publication status	Published - 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 (http://apl.aip.org/resource/1/applab/v101/i21/p211110_s1).

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abstract = "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.",

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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 (http://apl.aip.org/resource/1/applab/v101/i21/p211110_s1).",

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AU - Judge, A. C.

AU - Clark, A. S.

AU - Shahnia, S.

AU - Mägi, E. C.

AU - Steel, M. J.

AU - Xiong, C.

AU - Eggleton, B. J.

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AB - 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.

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Broadband photon-counting Raman spectroscopy in short optical waveguides

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