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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 29, Iss. 9 — May. 1, 2011
  • pp: 1367–1374

Highly Sensitive Monolithic Silicon Photonic Crystal Fiber Tip Sensor for Simultaneous Measurement of Refractive Index and Temperature

Il Woong Jung, Bryan Park, J. Provine, Roger T. Howe, and Olav Solgaard

Journal of Lightwave Technology, Vol. 29, Issue 9, pp. 1367-1374 (2011)

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Fiber optic sensors have applications in the measurement of a wide range of physical properties such as temperature, pressure, and refractive index. These sensors are immune to electromagnetic interference, made of high temperature dielectric materials and hence can be deployed in harsh environments where conventional electronics would fail. Photonic crystal (PC) fiber tip sensors are highly sensitive to changes in the refractive index and temperature while remaining compact and robust. In comparison to conventional fiber sensors such as fiber Bragg gratings (FBG) or long period fiber gratings (LPFG), they are attractive in several aspects. PC fiber tip sensors have better sensitivity to refractive index and temperature than FBG sensors and are have much smaller sensing volumes than FBGs and LPFGs. Their small size allows them to combine high sensitivity and structural robustness. The most attractive feature may be that PC fiber tip sensors also return a spectrally rich signal with independently shifting resonances that can be used to extract multiple physical properties of the measurand and distinguish between them. In this paper, we show that the PC fiber tip sensor is highly sensitive to the refractive index and temperature of the environment and that both parameters can be simultaneously determined using multiple wavelengths.

© 2011 IEEE

Il Woong Jung, Bryan Park, J. Provine, Roger T. Howe, and Olav Solgaard, "Highly Sensitive Monolithic Silicon Photonic Crystal Fiber Tip Sensor for Simultaneous Measurement of Refractive Index and Temperature," J. Lightwave Technol. 29, 1367-1374 (2011)

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