Difference Absorption Optical Fiber Methane Gas Sensor Based on FBG

2011 ◽  
Vol 128-129 ◽  
pp. 580-583 ◽  
Author(s):  
Yue Yi Kang ◽  
Yan Ju Wang ◽  
Li Kun Yang ◽  
Yu Tian Wang
Keyword(s):  
Optical Fiber ◽  
Near Infrared ◽  
Light Emitting Diode ◽  
Interference Filter ◽  
Light Emitting ◽  
Methane Gas ◽  
Real Time Measurement ◽  
Remote Sensor ◽  
Infrared Spectral ◽  
Difference Absorption

In this paper, based on analysis of the near infrared spectral absorption of methane molecule and considering factors such as compatibility with the transmission characteristics of silica optical fiber and the price, using Fiber Bragg Grating (FBG) filters to replace the the traditional interference filter, a novel kind of all-fiber remote sensor utilizing FBG filters and 1.33μm high power light-emitting diode (LED) was developed for real time measurement of methane gas concentration. FBG has a low insert loss and can be produced easily compared with dielectric interference filters. Theory and experiment proved that the system has simple construct and high sensibility.

Progress Toward Crystalline-Silicon-Based Light-Emitting Diodes

MRS Bulletin ◽  
1993 ◽  
Vol 18 (7) ◽  
pp. 22-28 ◽  
Author(s):  
Leigh Canham
Keyword(s):  
Near Infrared ◽  
Crystalline Silicon ◽  
Light Emitting Diode ◽  
Holy Grail ◽  
Light Emitting ◽  
Vlsi Technology ◽  
Materials Research ◽  
Infrared Spectral ◽  
Spectral Ranges ◽  
Silicon Based

The semiconductor silicon is the dominant material in microelectronics and is one of the best-studied materials known to humanity. Its inability to emit light efficiently is therefore well documented. Nevertheless, a “holy grail” of semiconductor materials research has for decades been the realization of an efficient Si light-emitting diode (LED). Such a device would enable optoelectronic circuitry to be based entirely on silicon and would revolutionize VLSI technology since the other required Si-based devices (detectors, waveguides, modulators, etc.) have already been demonstrated. Although this holy grail has proved elusive, the 1990s have heralded greatly renewed interest and optimism in the development of such devices for both the visible and near-infrared spectral ranges. Dramatic progress is at last being made. This review focuses, in a somewhat chronological manner, on the progress of specific approaches to realizing crystalline structures of high radiative efficiency, and the materials constraints involved.

Electrically driven single microribbon based near-infrared exciton-polariton light-emitting diode

CrystEngComm ◽  
2021 ◽  
Author(s):  
Mingming Jiang ◽  
Fupeng Zhang ◽  
Kai Tang ◽  
Peng Wan ◽  
Caixia Kan
Keyword(s):  
High Performance ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Light Sources ◽  
Coherent Light ◽  
Light Emitting ◽  
Exciton Polaritons ◽  
Laser Devices

Achieving electrically-driven exciton-polaritons has drawn substantial attention toward developing ultralow-threshold coherent light sources, containing polariton laser devices and high-performance light-emitting diodes (LEDs). In this work, we demonstrate an electrically driven...

Heat-resistant reflectors for enhanced 850-nm near infrared light-emitting diode efficiency

2021 ◽  
pp. 103879
Author(s):  
Hyung-Joo Lee ◽  
Gwang-Hoon Park ◽  
Jin-Su So ◽  
Choong-Hun Lee ◽  
Jae-Hoon Kim ◽  
...  
Keyword(s):  
Near Infrared ◽  
Light Emitting Diode ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Light Emitting ◽  
Heat Resistant

Enhancing and Tuning broadband near-infrared (NIR) photoluminescence properties in Cr3+-doped Ca2YHf2Al3O12 garnet phosphors via Ce3+/Yb3+-codoping for LED applications

2021 ◽  
Author(s):  
Qianqian Zhang ◽  
Guogang Li ◽  
Peipei Dang ◽  
Dongjie Liu ◽  
Dayu Huang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Light Emitting Diode ◽  
Food Composition ◽  
Night Vision ◽  
Photoluminescence Properties ◽  
Light Emitting ◽  
Measurement Area

Near-infrared emitting phosphor-converted light-emitting diode (NIR pc-LED) attracts much attention as the promising applications in night vision, biosensor, food composition and freshness measurement area and so on, while the discovery...

Broadband near-infrared BaMSi3O9:Cr3+ (M = Zr, Sn, Hf) phosphors for light-emitting diode applications

2021 ◽  
Author(s):  
Yan Zhang ◽  
Yanjie Liang ◽  
Shihai Miao ◽  
Dongxun Chen ◽  
Shao Yan ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Light Emitting Diode ◽  
Solid State Reaction Method ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Reaction Method ◽  
Simple Solid State Reaction

A series of Cr3+-doped BaMSi3O9 (M = Zr, Sn, Hf) near-infrared emitting phosphors with tunable luminescence properties have been successfully synthesized by using a simple solid-state reaction method. The developed...

Transcranial, Red/Near-Infrared Light-Emitting Diode Therapy to Improve Cognition in Chronic Traumatic Brain Injury

2016 ◽  
Vol 34 (12) ◽  
pp. 610-626 ◽  
Author(s):  
Margaret A. Naeser ◽  
Paula I. Martin ◽  
Michael D. Ho ◽  
Maxine H. Krengel ◽  
Yelena Bogdanova ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Near Infrared ◽  
Light Emitting Diode ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Light Emitting

Near-Infrared (NIR) polymer light-emitting diode (PLED) based on organo-Yb3+-complex-grafted poly(N-vinylcarbazole) (PVK)

2018 ◽  
Vol 204 ◽  
pp. 30-35 ◽  
Author(s):  
Baoning Li ◽  
Guorui Fu ◽  
Jiaqing Guan ◽  
Yani He ◽  
Lin Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Polymer Light Emitting Diode
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