Results 161 to 170 of about 3,023 (218)

Chemical sensing with microbent optical fiber

Optics Letters, 2001
We propose and demonstrate the possibility of using a permanently microbent bare optical fiber for detecting chemical species. Two detection schemes, viz., a bright-field detection scheme (for the core modes), and a dark-field detection scheme (for the cladding modes) have been employed to produce a fiber-optic sensor.
T L, S, N A, George, P, Sureshkumar, P, Radhakrishnan, C P, Vallabhan, V P, Nampoori   +5 more
openaire   +2 more sources

Fiber-Optic Sensing: A Historical Perspective

Journal of Lightwave Technology, 2008
Sensing via fiber optics has occupied R&D groups for over 40 years, and some important transitions into the commercial sector have been achieved. We look at the fundamental concepts involved in the various sensing approaches, and the differentiators which have led to commercial impact. We also look to the future of fiber-optic sensors.
Culshaw, B., Kersey, A.
openaire   +3 more sources

innoFSPEC: fiber optical spectroscopy and sensing

SPIE Proceedings, 2008
innoFSPEC Potsdam is presently being established as in interdisciplinary innovation center for fiber-optical spectroscopy and sensing, hosted by Astrophysikalisches Institut Potsdam and the Physical Chemistry group of Potsdam University, Germany. The center focuses on fundamental research in the two fields of fiber-coupled multi-channel spectroscopy
Roth, Martin M., Löhmannsröben, Hans-Gerd (Prof. Dr.), Kelz, A., Kumke, Michael Uwe (PD Dr.)   +3 more
openaire   +2 more sources

Side-hole fiber for fiber-optic pressure sensing

Optics Letters, 1986
An optical fiber whose structure is similar to that of the PANDA fiber, but with two open channels in the place of the stress members, is investigated. Variations of the internal or external gas pressure permit tuning of the fiber birefringence (10−4 rad m−1 Pa−1) over a wide range, including sign reversal, and application as a pressure sensor.
H M, Xie, P, Dabkiewicz, R, Ulrich, K, Okamoto   +3 more
openaire   +2 more sources

The fiber optical sensing based on Brillouin scattering

2014 22nd Signal Processing and Communications Applications Conference (SIU), 2014
Fiber optic sensor technology based on Brillouin scattering is rapidly spreading due to quantities is great precision measured such as temperature, strain and vibration in the long haul distributed sensing. In this study Brillouin scattering has been analyzed in the single mode fiber.
Ozturk, Nail Ferhat, YÜCEL, MURAT, YÜCEL, MURAT, Goktas, H. Haldun   +3 more
openaire   +2 more sources

Fiber-optic sensing of pressure and temperature

Applied Optics, 1979
The use of a fiber-optic Mach-Zehnder interferometer to measure differences in temperature or pressure between two single-mode fiber arms is described. Temperature or pressure changes are observed as a motion of an optical interference fringe pattern. Values are calculated for the pressure and temperature dependence of the fringe motion.
openaire   +2 more sources

Polymer Optical Fibers for Sensing

Macromolecular Symposia, 2020
AbstractSensing techniques based on optical fibers are used in numerous key fields. For example, optical fiber sensors are exploited in medical diagnostics, environmental monitoring, physical parameters detection, industrial applications, food safety, and security.
Cennamo N., Zeni L.
openaire   +1 more source

Fiber optic chemical sensing

SPIE Proceedings, 2005
Monitoring of chemical species is important to a number of industrial and energy related industries. This paper presents a comparison of two fiber optic sensing schemes which are demonstrated for the detection of acetylene and carbon monoxide. The first sensor configuration utilizes the newly developed random hole optical fiber and detects gases ...
Gary Pickrell, Wei Peng, Bassam Alfeeli, Anbo Wang   +3 more
openaire   +1 more source

Status of Fiber Optic Acoustic Sensing

8th Optical Fiber Sensors Conference, 1992
In the past few years a great deal of development effort has gone into fiber optic hy drophones for a variety of Naval applications. Significant demonstrations of fiber optic hydrophone technology have taken place in fixed undersea, towed array, submarine and Arctic environments.
openaire   +1 more source

Fiber optic acoustic sensing

SPIE Proceedings, 2012
A review of fiber optic acoustic sensors for naval applications is presented. Limitations of fiber interferometric sensors are described and novel acoustic sensor transducers enabled through fiber laser sensor technology are presented.
openaire   +1 more source