D-type optical fiber biosensor

• Main Authors: Shinn-Fwu Wang, 王信福
• Other Authors: Rong-Seng Chang
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/76685337051686765827

博士 === 國立中央大學 === 光電科學研究所 === 93 === In the dissertation, a D-type optical fiber biosensor based on the surface plasmon resonance (SPR) technology is proposed. The optical fiber biosensor is a novel sensing device based on the surface plasmon resonance (SPR) technology or/and heterodyne interferometry. In the sensing mechanism, we only drop a little tested sample (e.g., alcohol, C6H12O6 solution etc.) on the sensing surface of the sensor. The refractive indices and the other parameters of the tested medium can be achieved by measuring the phase difference variations and the light intensity from the output of the sensor. The senor has some merits, e.g., small size, smaller sample volume, easy measurement and suitable for in vivo test etc. Besides, the D-type optical fiber biosensor has the tunable high sensitivity only if we choose different incident angle. From experimental results, it is evident that they are in good correspondence with theoretical results. Its sensitivity can reach 0.000002 refractive index unit (RIU). To sum up, it may be a useful sensor device for the researchers in the related fields, especially in biophotonics. Perhaps it will contribute to the human beings significantly in the future.