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. 2012 Feb 23;12(3):2467–2486. doi: 10.3390/s120302467

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© 2012 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 8. — (a) Transmission spectra of an LPG pair under temperature variations; the spectrum was shifted with the same phase; (b) The amount of the spectrum shift with temperature; it was shifted toward longer wavelength with the sensitivity of ∼39 pm/°C; (c) The spectra under strain variations; only the phase was changed without affecting the envelop curve; (d) The amount of the phase shift measured with strain [48].

Figure 8. — (a) Transmission spectra of an LPG pair under temperature variations; the spectrum was shifted with the same phase; (b) The amount of the spectrum shift with temperature; it was shifted toward longer wavelength with the sensitivity of ∼39 pm/°C; (c) The spectra under strain variations; only the phase was changed without affecting the envelop curve; (d) The amount of the phase shift measured with strain [48].