Výsledky vyhledávání - "F.A. Callegari"

Sign of the dominant charge carriers in photorefractive crystals determined by a phase-locked holographic technique

Autor: F. S. De Vicente, F.A. Callegari, A. A. Freschi, Marcos R. R. Gesualdi

Publikováno v: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP

Made available in DSpace on 2018-12-11T16:58:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01 This work presents a holographic method based on active feedback techniques for determining the sign of the dominant charge carriers in photo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1a23cde3210cedc990f2ce4ff1a2105
https://doi.org/10.1016/j.optmat.2015.08.007

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Field-trial evaluation of the Q-factor penalty introduced by fiber four-wave mixing wavelength converters

Autor: Hugo L. Fragnito, F.A. Callegari, Jorge D. Marconi, Marcelo L. F. Abbade

Publikováno v: Optics Communications. 282:106-116

The performance of tunable all-optical wavelength converters based on four-wave mixing in optical fibers is experimentally tested in a field-trial network. Two converters were built with two different fibers. The first one was made with a small varia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f2f7f47e63eae972e76e370770cd69f0
https://doi.org/10.1016/j.optcom.2008.09.071

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Amplification of 12×10Gb/s WDM signals with negligible FWM crosstalk in a double-pumped fiber optical parametric amplifier

Autor: F.A. Callegari, E.A.M. Fagotto, Hugo L. Fragnito, Michel E. Marhic, J.M. Chavez Boggio

Publikováno v: Optics Communications. 280:468-471

We report on the amplification of 12 × 10 Gb/s wavelength-division-multiplexed signals by a double-pumped fiber optic parametric amplifier (2P-FOPA). A gain of 10 dB is obtained using a 4.3 km-long conventional dispersion shifted fiber (DSF) as nonl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::541993bc3cdda072f98648a3d0604d8d
https://doi.org/10.1016/j.optcom.2007.08.033

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Formalismo óptico matricial e aplicações

Autor: Agnaldo A. Freschi, F.A. Callegari

Publikováno v: Revista Brasileira de Ensino de Física v.37 n.3 2015
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF
Revista Brasileira de Ensino de Física, Volume: 37, Issue: 3, Pages: 3303-1-3303-5, Published: SEP 2015
Revista Brasileira de Ensino de Física, Vol 37, Iss 3, Pp 3303-1-3303-5

O formalismo óptico matricial é desenvolvido a partir da aplicação da lei de Snell para descrever a refração de raios óticos numa superfície esférica. A seguir, dito formalismo é aplicado para achar e justificar parâmetros típicos e expre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da8c6281d7145cfc949361d3164020f3
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172015000300303

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Q penalties due to pump phase modulation and pump RIN in fiber optic parametric amplifiers with non-uniform dispersion

Autor: A. Guimaraes, Hugo L. Fragnito, F.A. Callegari, Jorge D. Marconi, J.M. Chavez Boggio

Publikováno v: Optics Communications. 249:451-472

We present an experimental and numerical investigation of the quality factor degradation (Δ Q ) due to pump phase modulation and pump relative intensity noise (RIN) in single- and double-pumped fiber optical parametric amplifiers (FOPAs). These pena

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6bbabf8d09ec7966346c99871091fa1a
https://doi.org/10.1016/j.optcom.2005.01.056

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Influence of zero dispersion wavelength variations on cross-talk in single-pumped fiber optic parametric amplifiers

Autor: Jorge D. Marconi, J.M. Chavez Boggio, A. Guimaraes, Hugo L. Fragnito, F.A. Callegari

Publikováno v: Optics Communications. 242:471-478

We show that variations of the zero dispersion wavelength ( λ 0 ) in single-pumped fiber optic parametric amplifiers (FOPAs), greatly enhances four-wave mixing induced cross-talk in a two-channel wavelength division multiplexed system. We compare ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eee184e2fea9da693319ded010c202ba
https://doi.org/10.1016/j.optcom.2004.09.003

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Spectral analysis of the 4d95d and 4d95f configurations in octuple ionization of xenon, Xe IX

Autor: Mario Gallardo, J. G. Reyna Almandos, M. Raineri, F.A. Callegari, A.G. Trigueiros

Publikováno v: Journal of Quantitative Spectroscopy and Radiative Transfer. 73:13-22

A capillary light source was used to observe the spectrum of eight times-ionized xenon, Xe IX, in the vacuum ultraviolet range, 270– 1300 A . One hundred and nine transitions have been identified as combinations between levels of the 4d95d with 4d9

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36c3e4795e77ba1d10bd259f775cbf5f
https://doi.org/10.1016/s0022-4073(01)00165-0

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Parametric amplifier for mid-span phase conjugation with simultaneous compensation of fiber loss and chromatic dispersion at 10 Gb/s

Autor: Hugo L. Fragnito, F.A. Callegari, Jorge D. Marconi, M. R. X. deBarros, J.M. Chavez Boggio, M.L. Rocha, A. Guimaraes

Publikováno v: Microwave and Optical Technology Letters. 42:503-505

We demonstrate simultaneous compensation of loss and chromatic dispersion for 10-Gb/s transmission over 90-km of standard fiber using mid-span phase conjugation with a fiber-optic parametric amplifier that provides 9.4-dB gain over a bandwidth of 17

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ea2fb9f0a4342b8d713561ca57ad1e6
https://doi.org/10.1002/mop.20350

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Spurious Four-Wave Mixing in Two-Pump Fiber-Optic Parametric Amplifiers

Autor: Hugo L. Fragnito, J.M.C. Boggio, F.A. Callegari

Publikováno v: IEEE Photonics Technology Letters. 16:434-436

We present an experimental study on four-wave mixing (FWM) between two signals within a two-pump fiber-optical parametric amplifier (2P-FOPA). We demonstrate that the intensity of FWM spurious tones depend strongly on the signal power and length of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d156ada6e47d884f903804a5dd86d1cb
https://doi.org/10.1109/lpt.2003.823086

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Análise dos transientes de ondas de tensão em ambos os extremos de uma linha quarto de onda e analogia com o fenômeno de reflexão e transmissão de ondas eletromagnéticas

Autor: F.A. Callegari

Publikováno v: Revista Brasileira de Ensino de Física v.33 n.2 2011
Revista Brasileira de Ensino de Física
Sociedade Brasileira de Física (SBF)
instacron:SBF
Revista Brasileira de Ensino de Física, Volume: 33, Issue: 2, Article number: 2307, Published: JUN 2011
Revista Brasileira de Ensino de Física, Vol 33, Iss 2

Os valores estacionários da amplitude de uma onda de tensão em ambos os extremos de uma linha quarto de onda foram determinados através de uma análise de transiente, para um frente de onda incidente de tensão senoidal. Foram levadas em conta as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03af2f4a1a40bdb83a18f5d26799401b
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172011000200008

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