Mathematical modeling of chemical sensor based on passive fiber optic components

2003 ◽  
Author(s):  
Mohamed Mahmoud
Keyword(s):  
Mathematical Modeling ◽  
Chemical Sensor ◽  
Fiber Optic ◽  
Passive Fiber

scholarly journals Fiber-Optic Time-Resolved Fluorescence Sensor for in Vitro Serotonin Determination

1993 ◽  
Vol 47 (5) ◽  
pp. 590-597 ◽  
Author(s):  
Stephane Mottin ◽  
Canh Tran-Minh ◽  
Pierre Laporte ◽  
Raymond Cespuglio ◽  
Michel Jouvet
Keyword(s):  
Chemical Sensor ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Excitation Wavelength ◽  
Nitrogen Laser ◽  
Time Resolved ◽  
Temporal Effects ◽  
Starting Point

At pH 7 and with the excitation at wavelengths above 315 nm, previously unreported fluorescence of 5-HT (5-hydroxytryptamine) is observed. Two fluorescence bands were observed for 5-HT; the first emits at around 390 nm with an associated lifetime near 1 ns, and the other (well known) emits at 340 nm with an associated lifetime of 2.7 ns. With both static and time-resolved fluorescences, the spectral and temporal effects of the excitation wavelength were studied between 285 and 340 nm. With these basic spectroscopic properties as a starting point, a fiber-optic chemical sensor (FOCS) was developed in order to measure 5-HT with a single-fiber configuration, nitrogen laser excitation, and fast digitizing techniques. Temporal effects including fluorescence of the optical fiber were studied and compared with measurements both directly in cuvette and through the fiber-optic sensor. Less than thirty seconds are required for each measurement. A detection limit of 5-HT is reached in the range of 5 μM. Our system, with an improved sensitivity, could therefore be a possible and convenient “tool” for in vivo determination of 5-HT.

Optoelectronic selector switch for rf/microwave passive fiber optic networks

1995 ◽  
Author(s):  
Robert Y. Loo ◽  
James H. Schaffner ◽  
Gregory L. Tangonan ◽  
V. L. Jones
Keyword(s):  
Fiber Optic ◽  
Selector Switch ◽  
Passive Fiber ◽  
Fiber Optic Networks ◽  
Rf Microwave

scholarly journals FIBER-OPTIC CHEMICAL SENSOR USING VISIBLE SEMICONDUCTOR LASER AND PLASTICIZED POLY (VINYL CHLORIDE) MEMBRANE

1991 ◽  
Vol 7 (Supple) ◽  
pp. 1465-1468 ◽  
Author(s):  
YUJI KAWABATA ◽  
KEN-ICHI YASUNAGA ◽  
TOTARO IMASAKA ◽  
NOBUHIKO ISHIBASHI
Keyword(s):  
Semiconductor Laser ◽  
Vinyl Chloride ◽  
Chemical Sensor ◽  
Fiber Optic ◽  
Poly Vinyl Chloride

scholarly journals Анализатор спектра флуоресценции на основе оптоволоконного Y-циркулятора

2018 ◽  
Vol 44 (14) ◽  
pp. 50
Author(s):  
Э.К. Алгазинов ◽  
В.А. Шульгин ◽  
И.А. Лавриненко ◽  
А.А. Сирота
Keyword(s):  
Experimental Investigation ◽  
Fiber Optic ◽  
Laser Induced Fluorescence ◽  
Biological Media ◽  
Passive Fiber ◽  
Radiation Losses ◽  
Probe Analysis ◽  
Optical Beams ◽  
Lif Spectroscopy

AbstractWe consider a method of probe analysis employing fiber-optic a composite Y-circulator design for the implementation of laser-induced fluorescence (LIF) spectroscopy diagnostics. The proposed principle of the LIF analyzer is based on spatially separated directed optical beams of excitation and fluorescence radiations. Conditions of the effective Y-circulator operation as a passive fiber-optic switch are determined. Experimental investigation of the switched radiation losses is performed. An example of using the proposed analyzer for LIF diagnostics of biological media is presented.

scholarly journals Study on a New Program of Passive Fiber Optic Current Sensor

2012 ◽  
Vol 29 ◽  
pp. 2874-2878
Author(s):  
Danping Jia ◽  
Wei Xue ◽  
Jinhui Chen ◽  
Limin Zhao
Keyword(s):  
Fiber Optic ◽  
Current Sensor ◽  
Passive Fiber
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