| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Dual-Peak Bragg Gratings Inscribed in an All-Solid Photonic Bandgap Fiber for Sensing Applications |
| ZHANG Ji-Huang1, LIU Ning-Liang1, WANG Ying2, JI Ling-Ling3, LU Pei-Xiang1,2** |
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074
2Laboratory of Optical Information Technology, Wuhan Institute of Technology, Wuhan 430073
3College of Sciences, Wuhan University of Science and Technology, Wuhan 430081 |
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| Cite this article: |
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ZHANG Ji-Huang, LIU Ning-Liang, WANG Ying et al 2012 Chin. Phys. Lett. 29 074205 |
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Abstract Bragg gratings are inscribed in an all-solid photonic bandgap fiber by use of femtosecond laser irradiation. Dual-peak structure is observed in the transmission spectrum of the induced grating, which is formed by the coupling between the forward-propagating fundamental core mode and the backward-propagating core mode or supermode. Sensing characteristics of the device are investigated experimentally by employing strain and temperature tests, and similar behavior is obtained for both resonant peaks. The strain and temperature sensitivities are 0.968pm/μϵ and 12.01pm/°C, and 0.954pm/μϵ and 12.04pm/°C, for the two peaks, respectively. This device would find potential applications in real optical fiber sensing without extra reference gratings.
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Received: 08 December 2011
Published: 29 July 2012
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