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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 18 — Sep. 15, 2012
  • pp: 3768–3770

Sensing with optical vortices in photonic-crystal fibers

J. Demas, M. D. W. Grogan, T. Alkeskjold, and S. Ramachandran  »View Author Affiliations


Optics Letters, Vol. 37, Issue 18, pp. 3768-3770 (2012)
http://dx.doi.org/10.1364/OL.37.003768


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Abstract

We demonstrate optical polarization vortex generation in a photonic-crystal fiber (PCF) by means of a CO 2 laser-induced long period grating. Vortices are a special subclass of fiber modes that result in polarization-insensitive resonances even when grating perturbations are asymmetric, as is the case with structural perturbations in single-material PCFs. The physics of vortex generation, combined with the use of structural perturbations alone, in single-material fibers, opens up a new schematic for realizing harsh-environment sensors. We show that the temperature and polarization stability of our vortex devices is maintained for prolonged periods of time (tested up to 34 h) at temperatures exceeding 1000 °C. We envisage that this demonstration opens up a new way of realizing high-temperature sensors in a cost-effective manner.

© 2012 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 11, 2012
Revised Manuscript: July 9, 2012
Manuscript Accepted: July 20, 2012
Published: September 5, 2012

Citation
J. Demas, M. D. W. Grogan, T. Alkeskjold, and S. Ramachandran, "Sensing with optical vortices in photonic-crystal fibers," Opt. Lett. 37, 3768-3770 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3768

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