Results 91 to 100 of about 18,792 (313)

Review of long period fiber gratings written by CO₂ laser

, 2010
This paper presents a systematic review of long period fiber gratings (LPFGs) written by the CO2 laser irradiation technique. First, various fabrication techniques based on CO2 laser irradiations are demonstrated to write LPFGs in different types of ...
Yiping Wang, Wang, Yiping
core   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Tunable Filters Based on Cascaded Long-Period Polymer Waveguide Gratings

Photonic Sensors, 2022
Long-period waveguide grating based filters have attracted attention due to their flexible fabrication, a variety of materials and structures, low back reflection, low insertion loss, and excellent performance in the tuning range and temperature ...
Xin Shi, Rui Cao, Lingfang Wang
doaj   +1 more source

Sensing characteristics of structural microfiber long-period gratings

Optics Express, 2023
We present a detailed investigation into the sensing characteristics of a structural microfiber long-period grating (mLPG) sensor. By spirally winding a thinner microfiber to another thicker microfiber, periodic refractive index modulation is formed while the optical signal transmitted in the thicker microfiber is resonantly coupled out to the thinner ...
Yuchen Ge, Jiongshen Pan, Guangzheng Luo, Li-Peng Sun, Bai-Ou Guan   +4 more
openaire   +2 more sources

The application of a long period grating sensors to human respiratory plethysmography [PDF]

, 2007
A series of nine in-line curvature sensors on a garment are used to monitor the thoracic and abdominal movements of a human during respiration for application to Human Respiratory Plethysmography. These results are used to obtain volumetric tidal changes
Bennion, Ian, Allsop, Thomas D.P., Carroll, Karen, Webb, David J.   +3 more
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Properties of length-apodized phase-shifted lpgs operating at the phase matching turning point

, 2012
The characteristics of length-apodized phase-shifted fiber optic long period gratings with full and partial nanostructured coatings have been explored theoretically and experimentally.
Tatam, Ralph P., James, Stephen W., Topliss, Stephen M.   +2 more
core   +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

Liquid Metal‐Based Stretchable Strain Sensor for Fruit Growth Monitoring

Advanced Materials Technologies, EarlyView.
Schematic overview of the fruit growth sensor development workflow, including sensor fabrication by injection molding, electromechanical and environmental characterization, mechanical stability testing, electronic readout integration, and outdoor field validation for monitoring of fruit growth under practical orchard conditions.
Asad Ullah, Lennert Purnal, Maximilian Krack, Sander Vijgen, Thijs Vandenryt, Dieter Reenaers, Ronald Thoelen, Wim Deferme   +7 more
wiley   +1 more source

Long Period Fiber Grating Fabrication by Two-Step Infrared Femtosecond Fiber Laser Exposure

IEEE Photonics Journal, 2017
We develop a two-step infrared (IR) femtosecond fiber laser exposure technique to flexibly fabricate long period fiber gratings (LPFGs) with a high peak band-rejection efficiency of 35.4 dB, insertion loss of 4.36 dB, and 3 dB ...
Cong Zhang, Li Cheng, Songnian Fu, Ming Tang, Deming Liu   +4 more
doaj   +1 more source