TITLE

Highly sensitive fiber Bragg grating refractive index sensors

AUTHOR(S)
Wei Liang; Yanyi Huang; Yong Xu; Lee, Reginald K.; Yariv, Amnon
PUB. DATE
April 2005
SOURCE
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p151122
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We combine fiber Bragg grating (FBG) technology with a wet chemical etch-erosion procedure and demonstrate two types of refractive index sensors using single-mode optical fibers. The first index sensor device is an etch-eroded single FBG with a radius of 3 μm, which is used to measure the indices of four different liquids. The second index sensor device is an etch-eroded fiber Fabry-Pérot interferometer (FFPI) with a radius of ∼1.5 μm and is used to measure the refractive indices of isopropyl alcohol solutions of different concentrations. Due to its narrower resonance spectral feature, the FFPI sensor has a higher sensitivity than the FBG sensor and can detect an index variation of 1.4×10-5. Since we can measure the reflection signal, these two types of sensors can be fabricated at the end of a fiber and used as point sensors.
ACCESSION #
17185392

 

Related Articles

  • Optical fiber temperature sensor using a gain-switched Fabry–Perot semiconductor laser self-seeded from a linearly chirped fiber Bragg grating. Li, Shenping; Chan, K. T. // Applied Physics Letters;12/7/1998, Vol. 73 Issue 23 

    We present a highly sensitive fiber temperature sensor based on a gain-switched Fabry–Perot semiconductor laser self-seeded from a linearly chirped fiber Bragg grating. A temperature resolution of better than 0.1 °C was demonstrated. This sensor not only has the advantage of robustness...

  • A Hybrid LPG/CFBG for Highly Sensitive Refractive Index Measurements. An Sun; Zhishen Wu // Sensors (14248220);2012, Vol. 12 Issue 6, p7318 

    A simple and high sensitive method employing a hybrid long period grating (LPG)/chirped fiber Bragg grating (CFBG) for refractive index (RI) measurements is proposed and investigated experimentally. The wide wavelength range of backward cladding modes are excited through the coupling and...

  • Long Period Fiber Grating Fabricated by Defocused CO2 Laser for Refractive Index Sensing. Yang, Minwei; Wang, D. N.; Li, Yuhua // AIP Conference Proceedings;10/1/2008, Vol. 1055 Issue 1, p105 

    Long period fiber grating (LPFG) has many applications in optical fiber communications and optical fiber sensors. It can be fabricated by many methods. Recently, an edge written LPFG with large resonant peak loss and apparent asymmetric cladding mode coupling has been produced by focusing the...

  • Low-Coherence Fibre-Optic Interferometric Sensors. Jedrzejewska-Szczerska, M.; Gnyba, M.; Kosmowski, B.B. // Acta Physica Polonica, A.;Nov2011, Vol. 120 Issue 5, p621 

    In this paper low-coherence fibre-optic sensors based on the Fabry-Perot and Michelson interferometer, which were designed and elaborated at our laboratory, are shown. We present results of investigation of the fibre-optic sensors working in both configurations. These results allowed us to...

  • Interferometric Fiber Optic Sensors. Byeong Ha Lee; Young Ho Kim; Kwan Seob Park; Joo Beom Eom; Myoung Jin Kim; Byung Sup Rho; Hae Young Choi // Sensors (14248220);2012, Vol. 12 Issue 3, p2467 

    Fiber optic interferometers to sense various physical parameters including temperature, strain, pressure, and refractive index have been widely investigated. They can be categorized into four types: Fabry-Perot, Mach-Zehnder, Michelson, and Sagnac. In this paper, each type of interferometric...

  • Chemical Sensing Using Fiber Cavity Ring-Down Spectroscopy. Waechter, Helen; Litman, Jessica; Cheung, Adrienne H.; Barnes, Jack A.; Loock, Hans-Peter // Sensors (14248220);2010, Vol. 10 Issue 3, p1716 

    Waveguide-based cavity ring-down spectroscopy (CRD) can be used for quantitative measurements of chemical concentrations in small amounts of liquid, in gases or in films. The change in ring-down time can be correlated to analyte concentration when using fiber optic sensing elements that change...

  • Subluminal and superluminal propagation in Er3+ doped fiber Bragg grating. Zhuo, Z.; Ham, B. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Jan2009, Vol. 49 Issue 1, p117 

    The method to pump the FBG written into an Er3+-doped optical fiber is proposed to decrease or increase the group velocity of a probing pulse based on the fact that a pump-induced process changes the refractive index and dispersion associated with the 4I15/2-4I13/2 transition in Er3+-doped...

  • Photonic Crystal Fiber Sensors for Strain and Temperature Measurement. Jian Ju; Wei Jin // Journal of Sensors;2009, p1 

    This paper discusses the applications of photonic crystal fibers (PCFs) for strain and temperature measurement. Long-period grating sensors and in-fiber modal interferometric sensors are described and compared with their conventional single-mode counterparts. The strain sensitivities of the...

  • A simple two-ray interferometer based on a beamsplitter cube. Mikerin, S.; Ugozhaev, V. // Optics & Spectroscopy;Dec2011, Vol. 111 Issue 6, p973 

    Results of analysis of a very simple, compact interferometer for recording holographic diffraction gratings, which allows continuous tuning of the angle between the interfering beams from 0° to 80°, are presented. The device consists of a single optical element, a beamsplitter cube. The...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics