Results 21 to 30 of about 3,007,416 (292)

Response of fibre optic long period gratings operating near the phase matching turning point to the deposition of nanostructured coatings. [PDF]

, 2008
The response of the dual resonant bands of a fibre optic long period grating operating near the phase matching turning point to the deposition of a nanostructured coating is investigated. The dual resonant bands are observed to show a high sensitivity to
Tatam, Ralph P., Topliss, Stephen M., James, Stephen W., Cheung, C. S., S. M. Topliss, C. S. Cheung, R. P. Tatam, S. W. James   +7 more
core   +1 more source

An Experimental Study of the Effects of External Physiological Parameters on the Photoplethysmography Signals in the Context of Local Blood Pressure (Hydrostatic Pressure Changes)

Sensors, 2017
A comprehensive study of the effect of a wide range of controlled human subject motion on Photoplethysmographic signals is reported. The investigation includes testing of two separate groups of 5 and 18 subjects who were asked to undertake set exercises ...
Hongwei Yuan, Sven Poeggel, Thomas Newe, Elfed Lewis, Charusluk Viphavakit, Gabriel Leen   +5 more
doaj   +1 more source

Swept-source OCT with coherent imaging fibre bundles [PDF]

, 2009
OCT probes for endoscopy typically use a single optical fibre to deliver light to the measurement region. 2D imaging is achieved using mechanical scanning components at the probe tip.
Tatam, Ralph P., Ford, Helen D., Helen D. Ford, Ralph P. Tatam   +3 more
core   +1 more source

A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures

Sensors, 2018
In this paper, a hybrid sensor was fabricated using a IR-femtosecond laser to measure the thermal expansion and thermo-optical coefficient of silica-based fiber Bragg gratings (FBGs).
Litong Li, Dajuan Lv, Minghong Yang, Liangming Xiong, Jie Luo   +4 more
doaj   +1 more source

Fibre Optic Sensors with Nano-Structured Coatings. [PDF]

, 2006
A review of optical fibre devices employing nano-structured coatings is presented. Active and passive coatings, deposited using the Langmuirâ  Blodgett and electro-static self-assembly techniques, have been utilised to influence the transmission ...
Tatam, Ralph P., James, Stephen W., Stephen W James, Ralph P Tatam   +3 more
core   +1 more source

Low-coherence optical fibre speckle interferometry [PDF]

, 2006
This paper describes the development of optical fibre low-coherence speckle interferometers capable of three-dimensional surface profiling with a resolution of 10–20 µm and a depth range of typically tens of centimetres.
Balboa, Itziar, Tatam, Ralph P., Ford, Helen D., H D Ford, I Balboa, R P Tatam   +5 more
core   +1 more source

Liquid-Crystal-Filled Side-hole Fiber for High-Sensitivity Temperature and Electric Field Measurement

Micromachines, 2019
We propose a highly sensitive sensor based on a nematic liquid-crystal-filled side-hole fiber. The liquid crystal is precisely filled into an air hole of the optical fiber using a method of manually gluing in the fusion splicer.
Yijian Huang, Ying Wang, Chun Mao, Jingru Wang, Han Wu, Changrui Liao, Yiping Wang   +6 more
doaj   +1 more source

Multi-component strain development in superconducting magnet coils monitored using fibre Bragg grating sensors fabricated in highly linearly birefringent fibre [PDF]

, 2011
The commissioning of superconducting magnet coils was monitored using embedded optical fibre Bragg grating sensors (FBG) fabricated in highly linearly birefringent (HiBi) fibre.
Adam Johnstone, Stephen J Buggy, James, Stephen W., M’hamed Lakrimi, Andrew Twin, Twin, Andrew, Ralph P Tatam, Domptail, Fred, Lakrimi, M’hamed, Tatam, Ralph P., Stephen W James, Chehura, Edmon, Johnstone, Adam, Buggy, Stephen J., Edmon Chehura, Fred Domptail   +15 more
core   +1 more source

A Cladding-Pumped Device for Modal Gain Equilization Based on Rippled Few Mode Fiber

IEEE Photonics Journal
To achieve mode-division multiplexing (MDM) for long-distance transmission, the development of signal amplifiers, such as erbium-doped fiber amplifiers (EDFA), is crucial. As a solution for EDFA, cladding pump has gained attention due to its low cost and
Lu Dai, Yuanpeng Ding, Hui Zhang, Junjie Qi, Hongyan Shi, Jun Chu, Lei Zhang, Lei Shen, Zhaolong Liao, Shiqi Zhou, Jie Luo   +10 more
doaj   +1 more source

Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings

Sensors, 2019
This paper presents a review of our work concerning the recent progress in fabrications and applications of heating-induced long period fiber gratings (LPFGs).
Cailing Fu, Yiping Wang, Shen Liu, Zhiyong Bai, Changrui Liao, Jun He, Ying Wang   +6 more
doaj   +1 more source