Results 201 to 210 of about 10,558 (240)

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

Hydrostatic pressure sensitivity of standard polymer fibre Bragg gratings and etched polymer fibre Bragg gratings

SPIE Proceedings, 2014
The hydrostatic pressure sensitivity of polymer optical fibre Bragg grating of different diameters is investigated. For this purpose Bragg gratings are inscribed in single-mode polymer fibre and also in etched single-mode polymer fibre. The inherent pressure sensitivity of the grating are experimentally investigated up-to 1MPa by monitoring the change ...
Kishore Bhowmik, Ginu Rajan, Eliathamby Ambikairajah, Gang-Ding Peng   +3 more
openaire   +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.
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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

In-fibre Bragg grating sensors

Measurement Science and Technology, 1997
In-fibre Bragg grating (FBG) sensors are one of the most exciting developments in the field of optical fibre sensors in recent years. Compared with conventional fibre-optic sensors, FBG sensors have a number of distinguishing advantages. Significant progress has been made in applications to strain and temperature measurements.
openaire   +1 more source

Polymer fibre Bragg gratings tunable laser

2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference, 2006
Tunable laser using a polymer fibre Bragg grating with simple axial tension as tuning method is constructed. Continuous tunable wavelength over 35 nm with the peak power around -5 dBm and signal to noise ratio greater than 45 dB has been achieved.
H.Y. Liu, G.D. Peng, H.B. Liu, P.L. Chu
openaire   +1 more source

Fibre Bragg Grating Components (WG4)

1999
The COST 246 Working group WG4 “Bragg grating components” investigated the reliability of a new kind of all-fibre devices based in the coupling of different fibre modes by UV laser fabricated phrase gratings. The most prominent phase grating that couples the forward propagating to the backward propagating fundamental mode is called the fibre Bragg ...
openaire   +1 more source

Adding functionality to fibre Bragg gratings

Proceedings of LEOS'94, 2002
Until recently, research on optical fibre Bragg gratings has focused mainly on optimizing the fabrication of "plain" gratings, i.e. gratings with uniform amplitude and period. Grating lengths have also been limited by the size and shape of the writing beam, precluding fabrication of more complex structures. It is possible, however, to use more advanced
F. Ouellette, J. Canning, B. Eggleton, P. Hill, P.A. King, M.G. Sceats   +5 more
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Photosensitisation of Phosphosilicate Fibre Bragg Gratings

Photosensitivity and Quadratic Nonlinearity in Glass Waveguides: Fundamentals and Applications, 1995
Photolytic grating writing in phosphorous doped waveguides has recently been possible only with substantial hydrogen loading [1-3]. In [1] this has been demonstrated for phosphosilicate planar waveguides using 193nm whilst for aluminophosphosilicate fibres the writing wavelength was the 248nm KrF line [2]. We have recently demonstrated photosensitivity
J. Canning, R. Pasman, M.G. Sceats
openaire   +1 more source