Results 221 to 230 of about 58,600 (289)

On the origin of core-to-core variations in multi-core fibre Bragg gratings

Astronomical Telescopes + Instrumentation, 2018
Fibre Bragg gratings have been demonstrated to be a powerful tool with which to filter atmospheric emission lines from astronomical spectra. Multicore fibre technology has the potential to simplify the fabrication of fibre Bragg gratings, since all cores
S. Ellis, S. Min, S. Leon-Saval, J. Bland-Hawthorn   +3 more
semanticscholar   +1 more source

A fibre Bragg grating refractometer

Measurement Science and Technology, 2001
An opto-chemical in-fibre Bragg grating (FBG) sensor for refractive index measurement in liquids has been developed using fibre side-polishing technology. At a polished site where the fibre cladding has partly been removed, a FBG is exposed to a liquid analyte via evanescent field interaction of the guided fibre mode. The Bragg wavelength of the FBG is
Kerstin Schroeder, Wolfgang Ecke, Rudolf Mueller, Reinhardt Willsch, Andrey Andreev   +4 more
openaire   +1 more source

Dispersion-free fibre Bragg gratings

OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171), 2001
Fibre Bragg gratings with reduced/eliminated in-band dispersion are presented. When tested in add-drop configurations at 10 Gbit/s both 25 GHz and 50 GHz bandwidth gratings are shown to exhibit superior performance with no dispersion-induced penalties in the stopband.
Morten Ibsen, Periklis Petropoulos, Michalis N. Zervas, Ricardo Feced   +3 more
openaire   +1 more source

Fibre Bragg Gratings for Gain Equalisation

Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, 2001
An overview of the different types of UV photowriten fibre gratings used for optical amplifier gain equalisation will be presented.
openaire   +1 more source

Fibre Bragg gratings for temporal spectral astronomy

SPIE Proceedings, 2010
Temporal spectral astronomy or time resolved astronomy is the study of astrophysical phenomena that show spectral variability on very short timescales. These timescales are often too short to be resolved by current astronomical equipment. The lack of detailed observations in this area keeps important theoretical descriptions of astronomical events ...
Dawes, Judith M., Bland-Hawthorn, Joss Bland, Haynes, Roger Daniel, Mariën, Geraldine, Cvetojević, Nick, Jovanović, Nemanja, Withford., Michael J., Parker, Quentin A., Lawrence, Jon S.   +8 more
openaire   +2 more sources

Fibre Bragg grating sensor for respiratory monitoring

ACOFT/AOS 2006 - Australian Conference on Optical Fibre Technology/Australian Optical Society, 2006
A temperature sensor based on fibre Bragg gratings has been used to monitor human respiration. We discuss the thermodynamic properties of the sensor and present the general performance characteristics of the system.
Liang, Y., Mazzolini, Alexander, Stoddart, Paul   +2 more
openaire   +1 more source

Extending the operation range of a phase-sensitive optical time-domain reflectometer by using fibre with chirped Bragg gratings

Quantum electronics (Woodbury, N.Y.), 2020
>A record long external-disturbance detection distance of 140 km without employing optical amplifiers in the fibre line is demonstrated by a phase-sensitive optical time-domain reflectometer (Φ-OTDR) using a fibre section with inscribed chirped fibre ...
D. Kharasov, D. M. Bengalskii, M. Vyatkin, O. Naniǐ, E. Fomiryakov, S. Nikitin, S. Popov, Y. Chamorovsky, V. Treshchikov   +8 more
semanticscholar   +1 more source

Fibre Bragg Gratings Inscribed in Homemade Microstructured Fibres

Chinese Physics Letters, 2007
Fibre Bragg gratings (FBGs) are inscribed in homemade microstructured fibres by the standard phase mask method. Enhanced couplings between the forward fundamental mode and backward cladding modes are obtained. The mode coupling and spectral characteristics are investigated experimentally.
Jin Long, Kai Gui-Yun, Li Jin-Yan, Chen Wei, Liu Jian-Guo, Liu Yan-Ge, Wang Zhi, Zhang Jian, Liu Bo, Yuan Shu-Zhong, Dong Xiao-Yi   +10 more
openaire   +1 more source

Polymer optical fibre Bragg gratings

Advanced Photonics Congress, 2012
This paper provides a review of the current state of research and development into polymer fibre Bragg gratings, along with a description of some current challenges.
openaire   +1 more source

Moir  Fibre Bragg Grating Written on Strained Fibres

Chinese Physics Letters, 2004
Moire fibre Bragg gratings are made in a single mode fibre and a polarization-maintaining fibre respectively, using an excimer KrF laser and a phase mask. Two gratings are written at the same location of the optical fibre. The wavelength spacing can be finely tuned from 0 to 1.86 nm by straining the optical fibre during UV illumination.
Sun Lei, Feng Xin-Huan, Liu Yan-Ge, Zhang Wei-Gang, Yuan Shu-Zhong, Kai Gui-Yun, Dong Xiao-Yi   +6 more
openaire   +1 more source