Active Fiber Bragg Grating Hydrogen Sensors for All-Temperature Operation

The use of liquid hydrogen as a fuel requires low-cost multipoint sensing of hydrogen gas for leak detection and location well below the 4% explosion limit of hydrogen. Herein is presented a multipoint in-fiber hydrogen sensor capable of hydrogen detection below 0.5% concentration with a response time of less than 10 s. Our solution entails use of a fiber Bragg grating (FBG) coated with a layer of hydrogen-absorbing palladium which, in turn, induces strain in the FBG in the presence of hydrogen. Infrared power laser light is used to induce heating in the palladium coating which dramatically decreases sensor response time and increases the sensor's sensitivity at low temperatures. This technology promises an inexpensive fiber solution for a multipoint hydrogen detection array with only one fiber feed-through

[1]  Ingemar Lundström,et al.  A hydrogen−sensitive MOS field−effect transistor , 1975 .

[2]  K.P. Chen,et al.  Controlling fiber Bragg grating spectra with in-fiber diode laser light , 2004, IEEE Photonics Technology Letters.

[3]  A. Trouillet,et al.  Hydrogen leak detection using an optical fibre sensor for aerospace applications , 2000 .

[4]  Alex A. Kazemi,et al.  Highly sensitive hydrogen sensors using palladium-coated fiber optics with exposed cores and evanescent field interactions , 1998, Photonics West - Micro and Nano Fabricated Electromechanical and Optical Components.

[5]  Arnaldo D'Amico,et al.  Palladium‐surface acoustic wave interaction for hydrogen detection , 1982 .

[6]  Jose L. Cruz,et al.  In-line highly sensitive hydrogen sensor based on palladium-coated single-mode tapered fibers , 2003 .

[7]  B. Sutapun,et al.  Pd-coated elastooptic fiber optic Bragg grating sensors for multiplexed hydrogen sensing , 1999 .

[8]  Joel Villatoro,et al.  Fast detection of hydrogen with nano fiber tapers coated with ultra thin palladium layers. , 2005, Optics express.

[9]  Alain Trouillet,et al.  Surface plasmon resonance hydrogen sensor using an optical fibre , 2002 .

[10]  M. Steele,et al.  Palladium/cadmium‐sulfide Schottky diodes for hydrogen detection , 1976 .

[11]  J. Alfredo Guemes,et al.  Comparison of three types of fibre optic hydrogen sensors within the frame of CryoFOS project , 2005, International Conference on Optical Fibre Sensors.

[12]  Alain Trouillet,et al.  Fibre gratings for hydrogen sensing , 2006 .