Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Sidney L A Carrara"'
Publikováno v:
Optical Fiber Technology. 2:201-206
We present very simple expressions for scaling the well-known first- and second-order modes dispersion curves of circular core fibers in order to predict the propagation characteristics of symmetric waveguides with rectangular or elliptical cores. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::200e3555174e4f4044c53f89acd4f7d2
https://doi.org/10.1006/ofte.1996.0024
https://doi.org/10.1006/ofte.1996.0024
Publikováno v:
Journal of Intelligent Material Systems and Structures. 7:78-88
A finite element formulation for solving the scalar wave equation is described. The proposed formulation leads to an eigenvalue problem defined in terms of positive definite matrices. Therefore, convergence of the two first eigenvectors/eigenvalues t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28b996769530c0f0f7bfaccd593ee71f
https://doi.org/10.1177/1045389x9600700109
https://doi.org/10.1177/1045389x9600700109
Publikováno v:
Optics letters. 19(9)
A temperature- and strain-compensated two-mode fiber-optic bending sensor is presented. This sensor has the unique ability to measure bending over complex and arbitrary paths, using a strictly passive sensing tether. Experimental evidence demonstrate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd7d7bc8f4a08a41e4799cd55bef819f
https://pubmed.ncbi.nlm.nih.gov/19844410
https://pubmed.ncbi.nlm.nih.gov/19844410
Publikováno v:
Optics letters. 12(3)
The output signal of a birefringent fiber gyroscope is analyzed, and sources of error due to polarization cross coupling in the fiber and fiber components are identified. Techniques to suppress such errors by modulating the fiber birefringence and ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8234f422500467d4627a6a06744ce9c
https://pubmed.ncbi.nlm.nih.gov/19738843
https://pubmed.ncbi.nlm.nih.gov/19738843
Autor:
Sidney L. Alessi Carrara, C.-K. Jen, Osni Lisboa, Sérgio Frascino Müller de Almeida, Joana Oliveira, C. A. S. de Oliveira
Publikováno v:
SPIE Proceedings.
The sensing mechanism of an optical fiber accelerometer based on the interaction between the frequency shifted two modes in a two-mode fiber with an off-center core is presented. When the fiber is bent, by the action of an acceleration in a specific
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7f9c850ee5a18b33ef6803fc7956dc9
https://doi.org/10.1117/12.141306
https://doi.org/10.1117/12.141306
Publikováno v:
Fiber Optic Sensors IV.
We describe a new configuration for an optical fiber acousto-optic frequency shifter using a section of two-mode fiber where acousto-optic interaction causes mode-convertion accompanied by single sideband frequency translation. A fiexural acoustic wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3bbaf5b7050ab67fb53426e29d9a6ad
https://doi.org/10.1117/12.20285
https://doi.org/10.1117/12.20285
Autor:
Sidney L. Alessi Carrara
Publikováno v:
Fiber Optic Sensors IV.
Imperfections of a phase modulator driven below the proper modulation frequency of a fiber gyroscope can cause offset of the output signal, limiting long term stability. Bias drift induced by non-linear effects in the phase modulator was studied and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acc3d54215815b2f61af583c55263c71
https://doi.org/10.1117/12.20305
https://doi.org/10.1117/12.20305
Autor:
Sidney L. Alessi Carrara
Publikováno v:
Fiber Optic Sensors IV.
A simple technique is presented for azimuthal alignment of the birefringent axes of a polarization maintaining fiber at a splicing point. Alignment accuracy better than ±0.01 is consistently obtained and is fairly independent of polarization cross c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5014dcf9c8a9d360d33228f716163941
https://doi.org/10.1117/12.20286
https://doi.org/10.1117/12.20286
Publikováno v:
Journal of the Optical Society of America A. 12:869
It is shown that a small slope in the core index profile of a two-mode optical fiber causes the LP01 and LP11 modes to experience different shifts from the geometrical center of the fiber. This effect increases by orders of magnitude the bend sensiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2be8f0828628b4546d4fe27038930e5
https://doi.org/10.1364/josaa.12.000869
https://doi.org/10.1364/josaa.12.000869
Publikováno v:
Optical Fiber Sensors.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::299c501ba9794db2a4110957ffe5378e
https://doi.org/10.1364/ofs.1985.thcc4
https://doi.org/10.1364/ofs.1985.thcc4