結合共光程外差干涉術與表面電漿共振原理之直線型光纖感測器的研究

Study on a Cylindrical Optical Fiber Sensor Based on Multiple Total Internal Reflections in Heterodyne Interferometry

洪瑋駿(Wei-Jyun Hong)

指導教授 ： 王信福

健行科技大學/電資學院/電子工程系碩士班/碩士(2017年)

摘要

本論文提出一個結合衰減全反射原理與共光程外差干涉術的新型生化感測器。當雷射光源耦合進入光纖時，由於表面電漿共振的影響因素，且橫向磁波(TM wave) 會造成衰減消逝的現象。當光纖周圍量測不同的待測液體時，光源會因為外部介質的折射率改變，強度及相位會隨之產生變化，我們於光纖出射端經耦合並行徑解偏板及線性光偵測器可以取出光輸出，經由數學式與電腦的計算，可推算出此待測液體的折射率及濃度。生化感測器具有一些優點，本次模擬，檸檬酸液體折射率範圍1.332~1.334，其向位差約359 degree，靈敏度2.675*108 degree/RIU，解析度3.755 혹10-11 RIU，具有簡單的光學設備，容易操作，高測量度，高分辨率，高解析度，高靈敏度和模擬測試等。

關鍵字

檸檬酸(C6H8O7) ； 光纖感測器 ； 衰減全反射原理外差干涉術

並列摘要

In this paper, a new type biosensor based on attenuated total reflection (ATR) in heterodyne interferometry (HI) is presented. As a heterodyne optical source is launched into the biosensor at a suitable incident angle, we can obtain the phase difference between s- and p- polarizations at the output of the optical fiber sensor. When a laser light source enters a fiber, the internal refractive index of the fiber is affected by the metal film, The sensitivity of the sensor can reach 2.675혹108 degree / RIU in the refractive index range of 1.332 ~ 1.334. Besides, the best resolution of 3.755혹10-11 RIU can be obtained. However, the sensor has some advantages, such as high resolution, high sensitivity, easy to operate, and in real-time test, etc.

並列關鍵字

C6H8O7 ； Attenuated Total Reflection (ATR) ； Heterodyne interferometry(HI) ； Cylindrical Optical Fiber Sensor (Cylindrical OFS)

參考文獻

(1) Alina Vasilescu, Cristina Purcarea, Elena Popa, Medana Zamfir, Iuliana Mihai, Simona Litescu, Sorin David, Szilveszter Gaspar, Mihaela Gheorghiu, Jean-Louis Marty. “Versatile SPR aptasensor for detection of lysozyme dimer in oligomeric and aggregated mixtures”, Biosensors and Bioelectronics, 83, pp. 353–360, September, 2016.

(2) Akhilesh K. Mishra, Satyendra K. Mishra, Banshi D. Gupta. “SPR based fiber optic sensor for refractive index sensing with enhanced detection accuracy and figure of merit in visible region”, Sensors and Actuators B: Chemical, 344, pp. 86–91, June. 2015.

(3) Arlin L. Weikel, Sean D. Conklin, John N. Richardson. “A multiple reflection attenuated total reflectance sensor incorporating a glass–indium tin oxide surface modified via direct attachment or film encapsulation of colloidal gold nanoparticles”, Sensors and Actuators B: Chemical, 110, Issue 1, pp. 112–119, September. 2005.

(4) A. Gowri, V.V.R. Sai. “Development of LSPR based U-bent plastic optical fiber sensors”, Sensors and Actuators B: Chemical, 230, pp. 536–543, July, 2016.

(5) A. Khorsandi, S. Shojaei, F. Hosseinibalam. “Second-harmonic laser-coupled optical fiber sensor for pH measurement and corrosion detection based on evanescent field absorption”, Optics & Laser Technology, 44, Issue 5, pp. 1564–1569 July. 2012.