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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 21749–21757

Intermodal coupling of supermodes in a twin-core photonic crystal fiber and
its application as a pressure sensor

Zhengyong Liu, Ming-Leung Vincent Tse, Chuang Wu, Daru Chen, Chao Lu, and Hwa-Yaw Tam  »View Author Affiliations


Optics Express, Vol. 20, Issue 19, pp. 21749-21757 (2012)
http://dx.doi.org/10.1364/OE.20.021749


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Abstract

In this paper, we experimentally demonstrated the fabrication and hydrostatic pressure characteristics of a twin-core photonic crystal fiber (TC-PCF). Mode couplings in the TC-PCF for x- and y-polarizations were analyzed simultaneously using group effective index of guiding modes. The output spectrum of the TC-PCF was modulated due to the combined couplings of the two polarizations. To the best of our knowledge, it is the first time to measure hydrostatic pressure through the dual-polarization mode coupling in a TC-PCF. The measured sensitivity of the pressure sensor was −21pm/MPa. The length of the TC-PCF used for pressure measurement was 20cm, which is much shorter than pressure sensor based on PM-PCF, and does not require any external polarizing components, meaning that it is a good candidate for compact pressure sensor.

© 2012 OSA

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5295) Fiber optics and optical communications : Photonic crystal fibers
(280.5475) Remote sensing and sensors : Pressure measurement

ToC Category:
Sensors

History
Original Manuscript: July 5, 2012
Revised Manuscript: August 21, 2012
Manuscript Accepted: August 29, 2012
Published: September 6, 2012

Citation
Zhengyong Liu, Ming-Leung Vincent Tse, Chuang Wu, Daru Chen, Chao Lu, and Hwa-Yaw Tam, "Intermodal coupling of supermodes in a twin-core photonic crystal fiber and
its application as a pressure sensor," Opt. Express 20, 21749-21757 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-19-21749


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