Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR

Inuk Kang; Andrew Grant; Mihaela Dinu; James Jaques; Luke Pfister; Rohit Bhargava; P. Scott Carney

doi:10.1117/12.2305120

Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR

Inuk Kang, Andrew Grant, Mihaela Dinu, James Jaques, Luke Pfister, Rohit Bhargava, P. Scott Carney

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The use of optical frequency combs (OFCs) for multi-heterodyne spectroscopy has enabled unprecedented measurement capabilities for spectroscopic sensing, including rapid acquisition speed, high resolution and high sensitivity^1,2. Development of field deployable OFC sources that are widely tunable in the important chemical fingerprint region in the long-wavelength infrared (LWIR) is a major research challenge. In this paper, we report our recent efforts towards developing LWIR comb source for SILMARILS (Standoff ILluminator for Measuring Absorbance and Reflectance Infrared Light Signatures) program by IARPA. LGS has developed fiber optic sources producing spectral combs in the SWIR (1.52 to 1.56 μm and 1.7 to 2.0 μm) and in the LWIR (7.7 to 12.1 μm) regions. The spectral combs in the LWIR are generated by difference-frequency mixing one OFC centered around 1.54 μm with another OFC, whose center wavelength is tunable between 1.7 and 2.0 μm, in a nonlinear optical crystal. Average power of the generated LWIR is 1.2-12 mW and its instantaneous spectral breadth of the combs is > 80 cm^-1, sufficiently broad to cover multiple molecular absorption peaks. We demonstrate standoff sensing of chemical targets having concentration as low as 12 μg/cm² by measuring LWIR transflectance spectra using the comb source.

Original language	English (US)
Title of host publication	Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV
Editors	David W. Messinger, Miguel Velez-Reyes
Publisher	SPIE
ISBN (Electronic)	9781510617995
DOIs	https://doi.org/10.1117/12.2305120
State	Published - 2018
Event	Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV 2018 - Orlando, United States Duration: Apr 17 2018 → Apr 19 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10644
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Other

Other	Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV 2018
Country/Territory	United States
City	Orlando
Period	4/17/18 → 4/19/18

Keywords

Chemical sensing
Hyperspectral spectroscopy
Long-wave infrared
Optical frequency comb
Standoff detection

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Online availability

10.1117/12.2305120

Library availability

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Kang, I., Grant, A., Dinu, M., Jaques, J., Pfister, L., Bhargava, R., & Carney, P. S. (2018). Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR. In D. W. Messinger, & M. Velez-Reyes (Eds.), Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV Article 106441E (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10644). SPIE. https://doi.org/10.1117/12.2305120

Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR. / Kang, Inuk; Grant, Andrew; Dinu, Mihaela et al.
Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV. ed. / David W. Messinger; Miguel Velez-Reyes. SPIE, 2018. 106441E (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10644).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kang, I, Grant, A, Dinu, M, Jaques, J, Pfister, L, Bhargava, R & Carney, PS 2018, Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR. in DW Messinger & M Velez-Reyes (eds), Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV., 106441E, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10644, SPIE, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV 2018, Orlando, United States, 4/17/18. https://doi.org/10.1117/12.2305120

Kang I, Grant A, Dinu M, Jaques J, Pfister L, Bhargava R et al. Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR. In Messinger DW, Velez-Reyes M, editors, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV. SPIE. 2018. 106441E. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2305120

Kang, Inuk ; Grant, Andrew ; Dinu, Mihaela et al. / Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR. Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV. editor / David W. Messinger ; Miguel Velez-Reyes. SPIE, 2018. (Proceedings of SPIE - The International Society for Optical Engineering).

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abstract = "The use of optical frequency combs (OFCs) for multi-heterodyne spectroscopy has enabled unprecedented measurement capabilities for spectroscopic sensing, including rapid acquisition speed, high resolution and high sensitivity1,2. Development of field deployable OFC sources that are widely tunable in the important chemical fingerprint region in the long-wavelength infrared (LWIR) is a major research challenge. In this paper, we report our recent efforts towards developing LWIR comb source for SILMARILS (Standoff ILluminator for Measuring Absorbance and Reflectance Infrared Light Signatures) program by IARPA. LGS has developed fiber optic sources producing spectral combs in the SWIR (1.52 to 1.56 μm and 1.7 to 2.0 μm) and in the LWIR (7.7 to 12.1 μm) regions. The spectral combs in the LWIR are generated by difference-frequency mixing one OFC centered around 1.54 μm with another OFC, whose center wavelength is tunable between 1.7 and 2.0 μm, in a nonlinear optical crystal. Average power of the generated LWIR is 1.2-12 mW and its instantaneous spectral breadth of the combs is > 80 cm-1, sufficiently broad to cover multiple molecular absorption peaks. We demonstrate standoff sensing of chemical targets having concentration as low as 12 μg/cm2 by measuring LWIR transflectance spectra using the comb source.",

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N2 - The use of optical frequency combs (OFCs) for multi-heterodyne spectroscopy has enabled unprecedented measurement capabilities for spectroscopic sensing, including rapid acquisition speed, high resolution and high sensitivity1,2. Development of field deployable OFC sources that are widely tunable in the important chemical fingerprint region in the long-wavelength infrared (LWIR) is a major research challenge. In this paper, we report our recent efforts towards developing LWIR comb source for SILMARILS (Standoff ILluminator for Measuring Absorbance and Reflectance Infrared Light Signatures) program by IARPA. LGS has developed fiber optic sources producing spectral combs in the SWIR (1.52 to 1.56 μm and 1.7 to 2.0 μm) and in the LWIR (7.7 to 12.1 μm) regions. The spectral combs in the LWIR are generated by difference-frequency mixing one OFC centered around 1.54 μm with another OFC, whose center wavelength is tunable between 1.7 and 2.0 μm, in a nonlinear optical crystal. Average power of the generated LWIR is 1.2-12 mW and its instantaneous spectral breadth of the combs is > 80 cm-1, sufficiently broad to cover multiple molecular absorption peaks. We demonstrate standoff sensing of chemical targets having concentration as low as 12 μg/cm2 by measuring LWIR transflectance spectra using the comb source.

AB - The use of optical frequency combs (OFCs) for multi-heterodyne spectroscopy has enabled unprecedented measurement capabilities for spectroscopic sensing, including rapid acquisition speed, high resolution and high sensitivity1,2. Development of field deployable OFC sources that are widely tunable in the important chemical fingerprint region in the long-wavelength infrared (LWIR) is a major research challenge. In this paper, we report our recent efforts towards developing LWIR comb source for SILMARILS (Standoff ILluminator for Measuring Absorbance and Reflectance Infrared Light Signatures) program by IARPA. LGS has developed fiber optic sources producing spectral combs in the SWIR (1.52 to 1.56 μm and 1.7 to 2.0 μm) and in the LWIR (7.7 to 12.1 μm) regions. The spectral combs in the LWIR are generated by difference-frequency mixing one OFC centered around 1.54 μm with another OFC, whose center wavelength is tunable between 1.7 and 2.0 μm, in a nonlinear optical crystal. Average power of the generated LWIR is 1.2-12 mW and its instantaneous spectral breadth of the combs is > 80 cm-1, sufficiently broad to cover multiple molecular absorption peaks. We demonstrate standoff sensing of chemical targets having concentration as low as 12 μg/cm2 by measuring LWIR transflectance spectra using the comb source.

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Agile optoelectronic fiber sources for hyperspectral chemical sensing from SWIR to LWIR

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