Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Andrey Umnikov"'
Publikováno v:
Photonics, Vol 11, Iss 7, p 663 (2024)
The development of unique optical materials that provide amplification and lasing in new wavelength ranges is a major scientific problem, the solution of which is becoming the basis for the emergence of new optical technologies, which are primarily t
Externí odkaz:
https://doaj.org/article/54ae915838584259bb0d107f013d5449
Autor:
Denis Lipatov, Olga Egorova, Andrey Rybaltovsky, Alexey Abramov, Alexey Lobanov, Andrey Umnikov, Mikhail Yashkov, Sergey Semjonov
Publikováno v:
Photonics, Vol 10, Iss 7, p 796 (2023)
A highly erbium- and ytterbium-co-doped photosensitive fiber with a germanophosphosilicate glass core was fabricated by the MCVD method, utilizing an all-gas-phase deposition technique developed “in-house”. Due to doping with germanium oxide (GeO
Externí odkaz:
https://doaj.org/article/42fe0bb286394257835ca28fa84d7d39
Autor:
Andrey Rybaltovsky, Mikhail Yashkov, Alexey Abramov, Andrey Umnikov, Mikhail Likhachev, Denis Lipatov
Publikováno v:
Fibers, Vol 11, Iss 6, p 52 (2023)
Highly ytterbium-, aluminum- and phosphorus-co-doped silica fibers with low optical losses were fabricated by the MCVD method, utilizing an all-gas-phase deposition technique. Optical and laser properties of the active fibers with a phosphosilicate a
Externí odkaz:
https://doaj.org/article/af2e00532e014fd58ddbc987c28e6423
Autor:
Galina Bufetova, Alexey Kosolapov, Mikhail Yashkov, Andrey Umnikov, Vladimir Velmiskin, Vladimir Tsvetkov, Igor Bufetov
Publikováno v:
Photonics, Vol 10, Iss 3, p 335 (2023)
The core refractive index n2 of silica-based optical fiber preform heated to 2000 °C was determined experimentally for the first time. The measurements were carried out in the process of preform temperature reduction. It was shown that n2 could incr
Externí odkaz:
https://doaj.org/article/755863eecfc549f890220e2fc98aa60b
Autor:
Andrey Rybaltovsky, Sergei Popov, Dmitry Ryakhovskiy, Alexey Abramov, Andrey Umnikov, Oleg Medvedkov, Viktor Voloshin, Alexander Kolosovskii, Igor Vorob’ev, Yuriy Chamorovskiy, Denis Lipatov
Publikováno v:
Photonics, Vol 9, Iss 11, p 840 (2022)
A random narrow-linewidth lasing at a wavelength of 976 nm was obtained in an ytterbium-doped germanophosphosilicate fiber with an array of weakly reflecting fiber Bragg gratings (FBGs). A random laser cavity was formed by implementing the standard p
Externí odkaz:
https://doaj.org/article/60d6ba120b944d96ab2b368cb8f90c46
Autor:
Alexander Vakhrushev, Andrey Umnikov, Sergey Alyshev, Aleksandr Khegai, Elena Firstova, Lyudmila Iskhakova, Aleksei Guryanov, Mikhail Melkumov, Sergei Firstov
Publikováno v:
Photonics, Vol 9, Iss 11, p 788 (2022)
In this paper, we report the latest research results on the fabrication of double-clad Bi-doped germanosilicate core fibers with a rectangular inner cladding design for improved laser performance in the near-IR spectral region. Detailed comparative a
Externí odkaz:
https://doaj.org/article/1fd3e73323db44ca8de7b42b84f16aff
Autor:
Alexander Vakhrushev, Yan Ososkov, Sergey Alyshev, Aleksandr Khegai, Andrey Umnikov, Fedor Afanasiev, Konstantin Riumkin, Elena Firstova, Alexey Guryanov, Mikhail Melkumov, Sergei Firstov
Publikováno v:
Journal of Lightwave Technology. 41:709-715
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0cb726b67954359e1e5c49d87296816
https://doi.org/10.1109/jlt.2022.3219549
https://doi.org/10.1109/jlt.2022.3219549
Photosensitive Yb-Doped Germanophosphosilicate Artificial Rayleigh Fibers as a Base of Random Lasers
Autor:
Andrey Rybaltovsky, Sergei Popov, Denis Lipatov, Andrey Umnikov, Alexey Abramov, Oleg Morozov, Dmitry Ryakhovskiy, Viktor Voloshin, Alexander Kolosovskii, Igor Vorob’ev, Oleg Butov, Yuriy Chamorovskiy
Publikováno v:
Fibers, Vol 9, Iss 9, p 53 (2021)
Asingle-mode Yb-doped germanophosphosilicate fiber with ultra-low optical losses (less than 2 dB/km) was fabricated by means of the MCVD method utilizing an all-gas-phase deposition technique developed “in house”. The absorption and luminescent s
Externí odkaz:
https://doaj.org/article/45709a725d8744fc8597e1ab27ed02ec
Autor:
Semjonov, Denis Lipatov, Olga Egorova, Andrey Rybaltovsky, Alexey Abramov, Alexey Lobanov, Andrey Umnikov, Mikhail Yashkov, Sergey
Publikováno v:
Photonics; Volume 10; Issue 7; Pages: 796
A highly erbium- and ytterbium-co-doped photosensitive fiber with a germanophosphosilicate glass core was fabricated by the MCVD method, utilizing an all-gas-phase deposition technique developed “in-house”. Due to doping with germanium oxide (GeO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::f404675742fce7e7cf80cd67bfc76865
Autor:
Lipatov, Andrey Rybaltovsky, Mikhail Yashkov, Alexey Abramov, Andrey Umnikov, Mikhail Likhachev, Denis
Publikováno v:
Fibers; Volume 11; Issue 6; Pages: 52
Highly ytterbium-, aluminum- and phosphorus-co-doped silica fibers with low optical losses were fabricated by the MCVD method, utilizing an all-gas-phase deposition technique. Optical and laser properties of the active fibers with a phosphosilicate a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::df1c2710276685483ee9ad3c74c5a4d1