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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 2 — Jan. 15, 2010
  • pp: 103–105

Mid-IR to near-IR image conversion by thermally induced optical switching in vanadium dioxide

S. Bonora, U. Bortolozzo, S. Residori, R. Balu, and P. V. Ashrit  »View Author Affiliations

Optics Letters, Vol. 35, Issue 2, pp. 103-105 (2010)

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We demonstrate the image conversion from mid-IR to near-IR (NIR) exploiting high-contrast optical switching in vanadium oxide thin-film layers. The intensity distribution of a mid-IR beam is converted to NIR wavelengths exploiting the strong reflectivity changes induced by optical pumping in the mid-IR. We show an experimental setup in which the radiation of a Tm-doped fiber laser at 1940 μ m and a carbon dioxide at 10.6 μ m has been converted to both 850 nm and 1064 nm . The resolution was 35 μ m and was reached by using an inexpensive CCD camera. The sensitivity of the device increases linearly with sample temperature. We measured a threshold of 144 mW cm 2 , with a sample temperature of 62 ° C .

© 2010 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(110.3080) Imaging systems : Infrared imaging
(160.6840) Materials : Thermo-optical materials
(040.6808) Detectors : Thermal (uncooled) IR detectors, arrays and imaging

ToC Category:

Original Manuscript: September 1, 2009
Revised Manuscript: November 17, 2009
Manuscript Accepted: November 19, 2009
Published: January 11, 2010

S. Bonora, U. Bortolozzo, S. Residori, R. Balu, and P. V. Ashrit, "Mid-IR to near-IR image conversion by thermally induced optical switching in vanadium dioxide," Opt. Lett. 35, 103-105 (2010)

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