Enhanced sensitivity of gold modified tapered long period fiber grating for refractive index measurement

Z. Taghipour; M. I. Zibaii; Z. Saeedian; M. H. Ghezelayagh; H. Latifi

doi:10.1117/12.966398

17 October 2012 Enhanced sensitivity of gold modified tapered long period fiber grating for refractive index measurement

Z. Taghipour, M. I. Zibaii, Z. Saeedian, M. H. Ghezelayagh, H. Latifi

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84213T (2012) https://doi.org/10.1117/12.966398
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

In this work, a novel approach to application of tapered long period fiber grating (TLPFG) sensor is demonstrated, which are based on the modification of gold nanoparticles (GNPs). The sensor we propose here is a TLPFG fabricated with CO2 laser by heat-pulling method. TLPFG was immobilized with GNP and its refractive index sensitivity was measured. Experimental results show that modification of the TLPFG with GNPs enhances the evanescent wave and penetration depth around the sensor. Comparing different resonance dips of gold modified and bare TLPFG, improvement of 10.3 and 6.6 times can be estimated for wavelength and intensity sensitivities, respectively.

Citation Download Citation

Z. Taghipour, M. I. Zibaii, Z. Saeedian, M. H. Ghezelayagh, and H. Latifi "Enhanced sensitivity of gold modified tapered long period fiber grating for refractive index measurement", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84213T (17 October 2012); https://doi.org/10.1117/12.966398

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