Results 11 to 20 of about 18,792 (313)
Long Period Grating-Based Fiber Coupling to WGM Microresonators [PDF]
Micromachines, 2018 A comprehensive model for designing robust all-in-fiber microresonator-based optical sensing setups is illustrated. The investigated all-in-fiber setups allow light to selectively excite high-Q whispering gallery modes (WGMs) into optical microresonators,
Francesco Chiavaioli +6 more
doaj +2 more sources
Flexible Optoelectronic Hybrid Microfiber Long‐period Grating Multimodal Sensor [PDF]
Advanced ScienceFlexible wearable biosensors have emerged as a promising tool for tracking dynamic glycemic profiles of human body in diabetes management. However, it remains a challenge to balance the shrunken device space and multiple redundant sensing arrays for ...
Zhenru Li +8 more
doaj +2 more sources
Nested long period grating interferometers [PDF]
SPIE Proceedings, 2007 The concept of nested fibre optic long period grating (LPG) based interferometers is introduced. A number of in-series, identical LPGs may be used to form a set of nested, multiplexed Mach-Zehnder interferometers that may demodulated and demultiplexed by virtue of a Fourier analysis of the optical spectrum.
Murphy, Richard P. +2 more
openaire +3 more sources
Characterization of Long-period Grating Refractive Index Sensors and Their Applications
Sensors, 2009 The influence of grating length and bend radius of long-period gratings (LPGs) on refractive index sensing was examined. Sensitivity to refractive indexes smaller than that of silica could be enhanced by bending LPGs.
Kei Urabe, Hiroshi Tsuda
doaj +3 more sources
Long Period Fiber Grating Surface Plasmon Resonance Enhanced Sensor
Guangtongxin yanjiu, 2021 In view of the common problems of fiber surface plasmon resonance sensor with weak strength, low sensitivity and low plasma excitation efficiency, this paper proposes to use the long-period fiber grating as an auxiliary platform to study the ways of ...
LIU Zhi-wei +4 more
doaj +3 more sources
UV Inscription and Pressure Induced Long-Period Gratings through 3D Printed Amplitude Masks
Sensors, 2021 In this work, we demonstrate for the first time the capability to inscribe long-period gratings (LPGs) with UV radiation using simple and low cost amplitude masks fabricated with a consumer grade 3D printer.
Ricardo Oliveira +4 more
doaj +1 more source
Sensors, 2021 In this paper, we investigate modification of transmission spectra of long-period fiber grating structures with an acoustic shock front propagating along the fiber.
Oleg V. Ivanov +2 more
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Virtual long-period gratings [PDF]
Optics Letters, 2005 A theoretical prediction of a new fiber grating structure is presented. This new device is achieved when a high-birefringence fiber is heavily twisted. It behaves like a long-period grating, but its spectral response can be controlled with the input state of polarization of the light.
Jáuregui Misas, César +1 more
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Long-period gratings in chemical sensing [PDF]
SPIE Proceedings, 2008 A chemical sensor system consisting of a coated long period grating, which was spliced into a fiber loop cavity, has been prepared and characterized. Designer coatings based on polydimethylsiloxane and nanostructured organically modified silica (ORMOSIL) materials were prepared to provide enhanced sensitivity for a variety of key environmental ...
Barnes, Jack A. +6 more
openaire +2 more sources
Spot-Size Converter Based on Long-Period Grating
IEEE Photonics Journal, 2022 We propose a spot-size converter (SSC) by exploiting the high-efficiency mode conversion capability that a long-period grating (LPG) possesses. Our proof-of-concept LPG-based SSC, fabricated with optical polymer material on silicon nitride (Si3N4 ...
Jia Yao Deng +5 more
doaj +1 more source