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.

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

Experimental investigation of pavement behavior after embankment widening using a fiber optic sensor network

2014 ◽  
Vol 14 (1) ◽  
pp. 46-56 ◽  
Author(s):  
Xiaolin Weng ◽  
Hong-Hu Zhu ◽  
Jianxun Chen ◽  
Dongping Liang ◽  
Bin Shi ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Sensor Network ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Optic Sensor

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

Laser-Induced Fluorescence Measurements in Venturi-Cascaded Propane Gas Jet Flames

1999 ◽  
Author(s):  
Ala R. Qubbaj ◽  
S. R. Gollahalli
Keyword(s):  
Diffusion Flames ◽  
Concentration Field ◽  
Laser Induced Fluorescence ◽  
Pollutant Emissions ◽  
Average Decrease ◽  
Burner Exit ◽  
Fluorescence Measurements ◽  
Air Mixing ◽  
Flame Region ◽  
Lif Spectroscopy

Abstract “Venturi-cascading” technique is a means to control pollutant emissions of diffusion flames by modifying air infusion and fuel-air mixing rates through changing the flow dynamics in the combustion zone with a set of venturis surrounding the flame. A propane jet diffusion flame at a burner-exit Reynolds number of 5100 was examined with a set of venturis of specific sizes and spacing arrangement. The venturi-cascading technique resulted in a decrease of 33% in NO emission index along with a 24% decrease in soot emission from the flame, compared to the baseline condition (same flame without venturis). In order to understand the mechanism behind these results, Laser Induced Fluorescence (LIF) spectroscopy was employed to study the concentration field of the radicals (OH, CH and CN) in the baseline and venturi-cascaded flames. The LIF measurements, in the near-burner region of the venturi-cascaded flame, indicated an average decrease of 18%, 24% and 12% in the concentrations of OH, CH and CN radical, respectively, from their baseline values. However, in the mid-flame region, a 40% average increase in OH, from its baseline value, was observed. In this region, CH or CN radicals were not detected. The OH radical, in the downstream locations, was mostly affected by soot rather than by temperature. In addition, prompt-NO mechanism appeared to play a significant role besides the conventional thermal-NO mechanism.

Automated Multi-Diode Laser System for WDM Couplers Insertion Loss Measurements

2012 ◽  
Vol 2 (3) ◽  
pp. 1-7 ◽  
Author(s):  
Sami D. Alaruri
Keyword(s):  
Standard Deviation ◽  
Measurement System ◽  
Insertion Loss ◽  
Fiber Optic ◽  
Laser System ◽  
Internal Standards ◽  
Loss Measurement ◽  
Passive Fiber ◽  
Optical Attenuators ◽  
Variable Optical Attenuators

Insertion loss is an important parameter used to characterize passive fiber-optic components, such as WDM couplers and variable optical attenuators. This article describes an automated insertion loss measurement system which incorporates 980 nm, 1310 nm, 1529 nm and 1561 nm DFB lasers and two internal fiber optic standards. Insertion loss measurements collected with the system for WDM couplers and internal standards are presented. The system repeatability was validated by measuring the insertion loss for a WDM coupler six times at 980 nm, 1310 nm, 1529 nm and 1561 nm over 3 days period. The standard deviation calculated for the insertion loss measurements is less than 0.11 dB and the %CV is less than 1%.

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