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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 12 — Jun. 15, 2012
  • pp: 2283–2285

Long period grating cascaded to photonic crystal fiber modal interferometer for simultaneous measurement of temperature and refractive index

Dora Juan Juan Hu, Jun Long Lim, Meng Jiang, Yixin Wang, Feng Luan, Perry Ping Shum, Huifeng Wei, and Weijun Tong  »View Author Affiliations


Optics Letters, Vol. 37, Issue 12, pp. 2283-2285 (2012)
http://dx.doi.org/10.1364/OL.37.002283


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Abstract

We propose and demonstrate a novel and simple dual-parameter measurement scheme based on a cascaded optical fiber device of long-period grating (LPG) and photonic crystal fiber (PCF) modal interferometer. The temperature and refractive index (RI) can be measured simultaneously by monitoring the spectral characteristics of the device. The implemented sensor shows distinctive spectral sensitivities of 30.82nm/RIU (refractive index unit) and 47.4pm/°C by the LPG, and 171.96nm/RIU and 10.4pm/°C by the PCF modal interferometer. The simultaneous measurement of the temperature and external RI is experimentally demonstrated by the sensor. The temperature shift and RI shift calculated by the sensor matrix agree well with the actual temperature and RI change in the experiment.

© 2012 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 13, 2012
Manuscript Accepted: April 19, 2012
Published: June 7, 2012

Citation
Dora Juan Juan Hu, Jun Long Lim, Meng Jiang, Yixin Wang, Feng Luan, Perry Ping Shum, Huifeng Wei, and Weijun Tong, "Long period grating cascaded to photonic crystal fiber modal interferometer for simultaneous measurement of temperature and refractive index," Opt. Lett. 37, 2283-2285 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-12-2283

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