本文選題：pH　切入點(diǎn)：細(xì)直徑極大傾角光纖光柵　出處：《半導(dǎo)體光電》2017年03期 　論文類型：期刊論文

【摘要】：為提高現(xiàn)有光纖pH值傳感器的檢測(cè)靈敏度和檢測(cè)范圍,降低彎曲以及溫度交叉敏感的影響,提出以pH值敏感型智能水凝膠為敏感膜的細(xì)直徑極大傾角光纖光柵(Thin Excessively Tilted Fiber Grating,Thin-Ex-TFG)pH值傳感器。理論上分析了影響傳感器靈敏度的因素,研究了提高傳感器靈敏度的方案。然后,制作出不同封裝厚度的Thin-Ex-TFG pH值傳感器,進(jìn)行實(shí)驗(yàn)研究。實(shí)驗(yàn)結(jié)果表明:Thin-Ex-TFG pH值傳感器相比基于光纖Bragg光柵和長(zhǎng)周期光纖光柵的pH值傳感器,檢測(cè)靈敏度(最大可達(dá)-0.704nm/pH)和響應(yīng)范圍(pH值2~7)均有提高;與標(biāo)準(zhǔn)直徑極大傾角光纖光柵相比,其檢測(cè)靈敏度也有所提升。此外,增加水凝膠涂覆厚度或減少光纖光柵包層直徑均能有效地提高pH值檢測(cè)的靈敏度,實(shí)驗(yàn)結(jié)果與理論分析吻合。
[Abstract]:In order to improve the detection sensitivity and detection range of the existing optical fiber pH sensor, and reduce the influence of bending and temperature cross-sensitivity, This paper presents a thin Excessively Tilted Fiber Gratingn Thin-Ex-TFGG pH sensor based on pH sensitive smart hydrogel. The factors affecting the sensitivity of the sensor are analyzed theoretically, and the scheme to improve the sensitivity of the sensor is studied. Thin-Ex-TFG pH sensor with different encapsulation thickness was fabricated and studied experimentally. The experimental results show that the pH sensor based on fiber Bragg grating and long-period fiber Bragg grating is different from the one based on Thin-Ex-TFG pH sensor. Both the detection sensitivity (up to -0.704 nm / s pH) and the response range (pH = 2 ~ 7) were improved, and the sensitivity was also improved compared with the standard diameter maximum inclination fiber grating. Increasing the thickness of hydrogel coating or reducing the diameter of fiber grating cladding can effectively improve the sensitivity of pH detection. The experimental results are in agreement with the theoretical analysis.
【作者單位】： 重慶理工大學(xué)光纖傳感與光電檢測(cè)重慶市重點(diǎn)實(shí)驗(yàn)室;重慶理工大學(xué)重慶市現(xiàn)代光電檢測(cè)技術(shù)與儀器重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51276209,61505017) 重慶市科委基礎(chǔ)與前沿研究項(xiàng)目(cstc2014jcyjA0081) 重慶市教委科學(xué)技術(shù)研究項(xiàng)目(KJ1400942) 重慶理工大學(xué)研究生創(chuàng)新基金項(xiàng)目(YCX2015221)
【分類號(hào)】：TN253;TP212
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本文編號(hào)：1559074