Simultaneous refractive index and temperature measurement using a cascaded long-period grating device

Gwandu, Bashir A.L.; Shu, Xuewen; Allsop, Thomas D.P.; Zhang, Wei; Zhang, Lin and Webb, David (2002). Simultaneous refractive index and temperature measurement using a cascaded long-period grating device. IN: Proceedings of IEEE Sensors, 2002. IEEE.

Abstract

We present a compact scheme for simultaneous temperature and surrounding refractive index (SRI) measurement using two long period gratings (LPGs) of different periods inscribed side-by-side in a single piece of a double-cladding fibre. One of the LPGs is sensitive to both SRI and temperature changes whilst the second is SRI-insensitive but shows spectral shift with temperature changes. In addition, we show that a resonance peak of the SRI-insensitive LPG can be designed to appear in the EDFA wavelength region with potential use for gain flattening applications.

Additional Information: 1st IEEE International Conference on Sensors, Kissimmee, FL (US).
Uncontrolled Keywords: simultaneous temperature, surrounding refractive index(SRI), long period gratings(LPGs), double-cladding fibre, EDFA wavelength
Published Date: 2002-06-12

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