High-sensitivity refractive index sensor based on large-angle tilted fiber grating with carbon nanotube deposition

Abdulyezir A. Badmos; Qizhen Sun; Zhijun Yan; Raz N. Arif; Junxi Zhang; Alex Rozhin; Lin Zhang

doi:10.1117/12.2227703

29 April 2016 High-sensitivity refractive index sensor based on large-angle tilted fiber grating with carbon nanotube deposition

Abdulyezir A. Badmos, Qizhen Sun, Zhijun Yan, Raz N. Arif, Junxi Zhang, Alex Rozhin, Lin Zhang

Author Affiliations +

Proceedings Volume 9899, Optical Sensing and Detection IV; 989916 (2016) https://doi.org/10.1117/12.2227703
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

This paper presents a highly sensitive ambient refractive index (RI) sensor based on 81° tilted fiber grating (81°-TFG) structure UV-inscribed in standard telecom fiber (62.5μm cladding radius) with carbon nanotube (CNT) overlay deposition. The sensing mechanism is based on the ability of CNT to induce change in transmitted optical power and the high sensitivity of 81°-TFG to ambient refractive index. The thin CNT film with high refractive index enhances the cladding modes of the TFG, resulting in the significant interaction between the propagating light and the surrounding medium. Consequently, the surrounding RI change will induce not only the resonant wavelength shift but also the power intensity change of the attenuation band in the transmission spectrum. Result shows that the change in transmitted optical power produces a corresponding linear reduction in intensity with increment in RI values. The sample shows high sensitivities of ~207.38nm/RIU, ~241.79nm/RIU at RI range 1.344–1.374 and ~113.09nm/RIU, ~144.40nm/RIU at RI range 1.374–1.392 (for X-pol and Y-pol respectively). It also shows power intensity sensitivity of ~ 65.728dBm/RIU and ~ 45.898 (for X-pol and Y-pol respectively). The low thermal sensitivity property of the 81°-TFG offers reduction in thermal cross-sensitivity and enhances specificity of the sensor.

Citation Download Citation

Abdulyezir A. Badmos, Qizhen Sun, Zhijun Yan, Raz N. Arif, Junxi Zhang, Alex Rozhin, and Lin Zhang "High-sensitivity refractive index sensor based on large-angle tilted fiber grating with carbon nanotube deposition", Proc. SPIE 9899, Optical Sensing and Detection IV, 989916 (29 April 2016); https://doi.org/10.1117/12.2227703

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available