Abstract

An optical sensor based on surface plasmon resonance (SPR) for water measurement in process has been developed. The optical setup of this sensor is made in a simple and compact way, by the use of a laser diode as a point light source, providing an angularly spread (convergent) beam incident to the sensing part with imaging optics. Multichannel detection by a photodiode array and the Fourier transform optical setup eliminates the need for a mechanical angle scanner or a rotary stage in the system, resulting in a reduction in the size, the weight, and the cost of the sensor. Water concentrations in ethanol were measured by this sensor. Water concentrations of from 0.3% to 10% were obtained. Temperature dependence of the sensor and the method for compensation are discussed.

Optical chemical sensor based on surface plasmon measurement

Koji Matsubara, Satoshi Kawata, and Shigeo Minami
Appl. Opt. 27(6) 1160-1163 (1988)

Systematic characterization of spectral surface plasmon resonance sensors with absorbance measurement

Zhi-mei Qi, Shanhong Xia, Mingdeng Wei, Hirofumi Matsuda, and Haoshen Zhou
Appl. Opt. 46(32) 7963-7969 (2007)

Compact multi-channel surface plasmon resonance sensor for real-time multi-analyte biosensing

Yun Liu, Shimeng Chen, Qiang Liu, Jean-François Masson, and Wei Peng
Opt. Express 23(16) 20540-20548 (2015)

Dual-angle technique for simultaneous measurement of refractive index and temperature based on a surface plasmon resonance sensor

Wei Luo, Sheng Chen, Lei Chen, Hualong Li, Pengcheng Miao, Huiyi Gao, Zelin Hu, and Miao Li
Opt. Express 25(11) 12733-12742 (2017)

Surface plasmon resonance (SPR) sensors: approaching their limits?

Marek Piliarik and Jiří Homola
Opt. Express 17(19) 16505-16517 (2009)