Výsledky vyhledávání - "Kenneth O. Hill"

Modal noise in optical fibers: open and closed speckle pattern regimes

Autor: Y. Tremblay, B. S. Kawasaki, Kenneth O. Hill

Publikováno v: Applied optics. 20(9)

Modal noise generation in multimode optical fiber is identified as occurring in two statistically differing regimes, that in which there is independence of the speckles (open regime) and that in which the speckles have an interdependency related to t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5478be48592599c90e191b935e596974
https://pubmed.ncbi.nlm.nih.gov/20309364

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Characteristics of a fiber-optic Raman laser

Autor: B. S. Kawasaki, Kenneth O. Hill, Derwyn C. Johnson

Publikováno v: Applied optics. 16(5)

The frequency spectrum of a continuous wave fiber-optic Raman laser is measured and observed to consist of several discrete lines covering a 3-nm spectral range. The output of the laser also contains damped transients which are attributed to strong p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc6eefafaf6a424cb9342d2754a77d70
https://pubmed.ncbi.nlm.nih.gov/20168682

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Low-loss access coupler for multimode optical fiber distribution networks

Autor: Derwyn C. Johnson, Kenneth O. Hill, Brian S. Kawasaki

Publikováno v: Applied optics. 16(7)

The low loss access coupler includes two multimode optic fibers, each having a biconical taper section. The biconical taper sections of the fibers are fused together to provide optical coupling between the fibers. The fused fibers may also be twisted

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f267c49ce241b1ccdcd157b18d9ea9f
https://pubmed.ncbi.nlm.nih.gov/20168806

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Dichroism in the absorption spectrum of photobleached ion-implanted silica

Autor: G. Kajrys, Bernard Y. Malo, Jacques Albert, Derwyn C. Johnson, Kenneth O. Hill, Francois Bilodeau, John L. Brebner

Publikováno v: Optics letters. 18(14)

The optical absorption spectrum of ion-implanted silica is shown to become dichroic when it is photobleached with polarized 248-nm light. The dichroism is modeled by a photobleaching process that bleaches color centers preferentially depending on the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec3bd86abb3992065cf009c17f642a9d
https://pubmed.ncbi.nlm.nih.gov/19823309

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Long-length, long-period rocking filters fabricated from conventional monomode telecommunications optical fiber

Autor: Kenneth O. Hill, Derwyn C. Johnson, Peter G. Wigley, Bernard Y. Malo, Francois Bilodeau, George I. Stegeman

Publikováno v: Optics letters. 17(22)

Using fiber photosensitivity, we have made efficient, application-specific rocking filters from conventional monomode telecommunications optical fiber. Filters with a length of 10.89 m, a bandwidth of 58 nm, and a transmission of 99% at the resonant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19b9b07fceebcb03d78c557122df3da5
https://pubmed.ncbi.nlm.nih.gov/19798270

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Refractive-index changes in fused silica produced by heavy-ion implantation followed by photobleaching

Autor: Jacques Albert, Bernard Y. Malo, John L. Brebner, Derwyn C. Johnson, Richard Leonelli, Kenneth O. Hill

Publikováno v: Optics letters. 17(23)

The changes in refractive index, optical absorption, and volume of synthetic fused silica resulting from the implantation of germanium and silicon ions at energies of 3 and 5 MeV are reported. Implantation changes the density and generates ultraviole

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::058283e9aa0083ed2ceb9f53bd993b0d
https://pubmed.ncbi.nlm.nih.gov/19798273

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Ultraviolet light photosensitivity in Ge-doped silica fibers: wavelength dependence of the light-induced index change

Autor: Francois Bilodeau, Bernard Y. Malo, Kenneth O. Hill, K. A. Vineberg, Jacques Albert, Derwyn C. Johnson

Publikováno v: Optics letters. 15(17)

A novel technique is reported for detecting permanent and transient light-induced refractive-index changes (photosensitivity) in optical fibers. The index change is detected by irradiating one arm of an unbalanced Mach-Zehnder fiber interferometer wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca920925adaeb7e9da185ac1efe61522
https://pubmed.ncbi.nlm.nih.gov/19770963

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Optical fibers with negative group-velocity dispersion in the visible

Autor: Kenneth O. Hill, C. P. Kuo, Colin T. Seaton, George I. Stegeman, Ulf Osterberg

Publikováno v: Optics letters. 13(11)

Dispersion measurements have been performed in optical fibers having a photoinduced refractive-index grating in the core. The results show that negative group-velocity dispersion can be obtained in these fibers over a frequency region of 500 MHz for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7867378734c7e8023e817333206d985
https://pubmed.ncbi.nlm.nih.gov/19746116

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