Comparison between Raman-based and Brillouin-based
Research on Noise Reduction Approach of Raman Based Distributed Temperature Sensor Based on Nonlinear Filter
... DOI: 10.4236/ojapps.2019.98051 632 Open Journal of Applied Sciences herent loss of the sensing optical fiber and the random noise generated by dif- ferent noise sources. The excessively high random noise greatly reduces ...
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Lowering backward Raman and Brillouin scattering in waveguide Raman wavelength converters
... liquid Raman medium, several ap- proaches have been ...a Raman liquid or gas [2, 3, 6, ...the Raman transition over a very large span and up to 3400 cm −1 in case of water and up to 4155 cm −1 in ...
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Recent Progress in Brillouin Scattering Based Fiber Sensors
... Abstract: Brillouin scattering in optical fiber describes the interaction of an electro-magnetic field (photon) with a characteristic density variation of the ...downshifted Brillouin frequency (namely ...
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Inhibition of stimulated Raman scattering due to the excitation of stimulated Brillouin scattering
... coupling between stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) of in- tense laser in underdense plasma is studied theoretically and ...numerically. Based upon the ...
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Distributed Brillouin Fiber Sensor Assisted by First-Order Raman Amplification
... BOTDA sensors allow, therefore, a continuous monitoring of temperature and/or strain in an optical fiber [5]–[10]. The mea- surement range of this kind of systems is in all cases lower than 50 km [11] and generally ...
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Performance Comparison between PWM Based Inverter and SVPWM Based Inverter
... the comparison of operation of PWM and SVPWM based Inverter, Firstly model of PWM inverter is discussed and simulation model of PWM inverter is obtained using MATLAB/SIMULINK is introduced and it is ...
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Performance based Comparison between RDBMS and OODBMS
... Database is an obligatory part of any modern information system as mostly desktop and web-based applications utilize it for maintaining records in government and private sectors. Typically, Relational Database ...
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Optical fiber sensing cables for brillouin-based distributed measurements
... The Brillouin gain spectrum of an optical fiber can contain one or multiple peaks depending on the acoustic modes that are excited in the SBS inside or near the core ...the Brillouin spectrum ...the ...
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Brillouin optical time-domain analysis assisted by second-order Raman amplification
... Introduction Brillouin optical time domain analysis (BOTDA) is a widely-used tool to develop distributed measurements of parameters along optical ...resolution between 1 and 2 ...trade-off between ...
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Comparison between Clustering Algorithms Based On Ontology Based Text Mining Techniques
... For ontology making in text documents, the clustering algorithm is need to be applied. This paper focuses on two clustering techniques SOM and DVA for clustering documents based on their similarities. SOM and DVA ...
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Spectral discrimination of gastric cancer and atrophic gastritis by the comparison of three parameters based on Raman spectroscopy
... serum based on Raman spectroscopy was ...experiment. Comparison between different Raman spectra demonstrated that there are changes occurred with the deterioration of ...serum ...
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Comparison between flipped classroom and team-based learning
... indicated that students wanted a handout of the teaching materials and these students seemed to prefer a learning style based on a paper text rather than on a computer screen. Some of the free comments from the ...
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A Microwave Signal Generation Technique Based on Brillouin-Erbium Fiber Laser
... double Brillouin Stokes shifter (DBS) scheme was employed, whereby heterodyning between the initial Brillouin pump (BP) with the second-order Brillouin Stokes (BS2), fourth-order ...
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Raman Fiber Laser–Based Amplification in Telecommunications
... conclusion, Raman fiber laser–based amplification techniques have been characterized as standalone amplifiers, and its performances have been analyzed and optimized in long-haul repeatered and unrepeatered ...
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Comparison Between Shape-Based And Area-Based Features Extraction For Java Character Recognition
... features between one character with other characters, may cause the system to recognize as the same characters ...compare between shape-based features and area- based ...vary between ...
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Performance Comparison between Keyword-based and Semantic-based Web Page Classification Systems
... [email protected], [email protected], [email protected] DOI: 10.29322/IJSRP.9.03.2019.p8751 http://dx.doi.org/10.29322/IJSRP.9.03.2019.p8751 Abstract- With the increase of information, web page classification ...
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Distributed optical fibre sensors based on the coherent detection of spontaneous Brillouin scattering
... Chapter 2 Distributed Optical Fibre Sensors 6 2.3 Principle of Distributed Optical Fibre Sensors The concept of many distributed optical sensors operates under the powerful principle of Optical Time Domain Reflectometry ...
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Contribution to the development of distributed fiber optic sensors based on stimulated Brillouin scattering
... spots. Between the different types of fiber optics distributed sensors, the ones based on stimulated Brillouin scattering are the most promising technology, since they potentially allow high ...
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Modeling the performance of distributed fiber optical sensor based on spontaneous Brillouin scattering
... the comparison of the laboratory local straining inputs, BOTDR measurement results and simulation results computed with the evaluated weight function which follows a normal distribution and a bandwidth of ...
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Controllable Wavelength Channels for Multiwavelength Brillouin Bismuth/Erbium Based Fiber Laser
... the Brillouin Pump (BP) signal generated by the Tunable Laser Source (TLS) and also acts as an in-line amplifier for the subsequently generated Stokes ...DCF based non-linear gain medium, which consists of ...
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