High-temperature sensitivity of long-period gratings in B-Gecodoped fiber |
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Authors: | Xuewen Shu Allsop T. Gwandu B. Lin Zhang Bennion I. |
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Affiliation: | Photonics Res. Group, Aston Univ., Birmingham; |
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Abstract: | We report an investigation of thermal properties of long-period fiber gratings (LPFGs) of various periods fabricated in the conventional B-Ge codoped fiber. It has been found that the temperature sensitivity of the LPFGs produced in the B-Ge fiber can be significantly enhanced as compared with the standard telecom fiber. A total of 27.5-nm spectral shift was achieved from only 10°C change in temperature for an LPFG with 240-μm period, demonstrating a first ever reported high sensitivity of 2.75 nm/°C. Such an LPFG may lead to high-efficiency and low-cost thermal/electrical tunable loss filters or sensors with extremely high-temperature resolution. The nonlinear thermal response of the supersensitive LPG was also reported and first explained |
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