Sensitivity Enhancement in Low Cutoff Wavelength Long-Period Fiber Gratings by Cladding Diameter Reduction.
Sensitivity Enhancement in Low Cutoff Wavelength Long-Period Fiber Gratings by Cladding Diameter Reduction.
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DOI：
10.3390/s17092094
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发表时间：
2017-09-13
期刊：
影响因子：
--
通讯作者：
Tatam RP
中科院分区：
文献类型：
--
作者：
Del Villar I;Partridge M;Rodriguez WE;Fuentes O;Socorro AB;Diaz S;Corres JM;James SW;Tatam RP
采用氢氟酸腐蚀法减小了在低截止波长光纤中制作的长周期光纤光栅（LPFGs）的直径，使其对折射率的灵敏度提高了3倍以上，在1.333 ~ 1.4278范围内达到2611 nm/折射率单位。为LPFG选择的光栅周期允许在接近光谱的可见光范围的波长处访问色散转折点，其中光学设备较便宜。作为应用的一个例子，基于聚合物涂层的沉积的pH传感器在两种情况下进行了分析：具有无直径减小的LPFG和具有直径减小的LPFG。同样，获得了接近3倍的灵敏度增加，证明了该方法提高薄膜涂覆的LPFG化学传感器的灵敏度的能力。
The diameter of long-period fiber gratings (LPFGs) fabricated in optical fibers with a low cutoff wavelength was be reduced by hydrofluoric acid etching, enhancing the sensitivity to refractive index by more than a factor of 3, to 2611 nm/refractive index unit in the range from 1.333 to 1.4278. The grating period selected for the LPFGs allowed access to the dispersion turning point at wavelengths close to the visible range of the optical spectrum, where optical equipment is less expensive. As an example of an application, a pH sensor based on the deposition of a polymeric coating was analyzed in two situations: with an LPFG without diameter reduction and with an LPFG with diameter reduction. Again, a sensitivity increase of a factor of near 3 was obtained, demonstrating the ability of this method to enhance the sensitivity of thin-film-coated LPFG chemical sensors.
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影响因子：
4.7
作者：
Cardona-Maya, Yamile;Del Villar, Ignacio;Botero-Cadavid, Juan F.
通讯作者：
Botero-Cadavid, Juan F.
影响因子：
4.7
作者：
Vengsarkar, AM;Lemaire, PJ;Sipe, JE
通讯作者：
Sipe, JE
影响因子：
3.6
作者：
Bhatia, V;Vengsarkar, AM
通讯作者：
Vengsarkar, AM
影响因子：
3.8
作者：
Partridge, Matthew;James, Stephen W.;Tatam, Ralph P.
通讯作者：
Tatam, Ralph P.
影响因子：
3.6
作者：
Rees, ND;James, SW;Ashwell, GJ
通讯作者：
Ashwell, GJ