Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding
A novel Yb-doped fiber design for improved lasing near 976 nm based on spectral filtering of the amplified spontaneous emission near 1030 nm was realized and investigated. A very sharp short-pass filter was implemented by adding appropriately chosen high-index absorbing rods into the silica cladding...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/1/89 |
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| author | Svetlana S. Aleshkina Danila A. Davydov Vladimir V. Velmiskin Mikhail V. Yashkov Andrey A. Umnikov Sergey V. Alyshev Liudmila D. Iskhakova Mikhail M. Bubnov Denis S. Lipatov Mikhail E. Likhachev |
| author_facet | Svetlana S. Aleshkina Danila A. Davydov Vladimir V. Velmiskin Mikhail V. Yashkov Andrey A. Umnikov Sergey V. Alyshev Liudmila D. Iskhakova Mikhail M. Bubnov Denis S. Lipatov Mikhail E. Likhachev |
| author_sort | Svetlana S. Aleshkina |
| collection | DOAJ |
| description | A novel Yb-doped fiber design for improved lasing near 976 nm based on spectral filtering of the amplified spontaneous emission near 1030 nm was realized and investigated. A very sharp short-pass filter was implemented by adding appropriately chosen high-index absorbing rods into the silica cladding. In this case, the resonant interaction of the core mode with the high-index rod mode could be controlled by fiber bending, which allows for the precise adjustment of the stop-band position. It was shown that the utilization of Sm-doped absorbing rods allows one to achieve very high absorption of emission at unwanted wavelengths, but it also adds background losses for the pump near 915 nm and for the signal at 976 nm. Despite this fact, the improvement of efficiency in the 976 nm fiber amplifier, after shifting the stop-band to 1000 nm, was clearly demonstrated. Based on theoretical calculations, it was shown that, after optimizing the fiber parameters, a further twofold improvement in efficiency was possible despite the excess losses at the pump and signal wavelengths. |
| first_indexed | 2024-03-08T10:37:08Z |
| format | Article |
| id | doaj.art-1f1c740b003a436e8e0980e98b71a3ce |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-08T10:37:08Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-1f1c740b003a436e8e0980e98b71a3ce2024-01-26T18:09:58ZengMDPI AGPhotonics2304-67322024-01-011118910.3390/photonics11010089Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the CladdingSvetlana S. Aleshkina0Danila A. Davydov1Vladimir V. Velmiskin2Mikhail V. Yashkov3Andrey A. Umnikov4Sergey V. Alyshev5Liudmila D. Iskhakova6Mikhail M. Bubnov7Denis S. Lipatov8Mikhail E. Likhachev9Prokhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaDevyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49 Tropinina St., 603951 Nizhny Novgorod, RussiaDevyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49 Tropinina St., 603951 Nizhny Novgorod, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaDevyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49 Tropinina St., 603951 Nizhny Novgorod, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Center, 119333 Moscow, RussiaA novel Yb-doped fiber design for improved lasing near 976 nm based on spectral filtering of the amplified spontaneous emission near 1030 nm was realized and investigated. A very sharp short-pass filter was implemented by adding appropriately chosen high-index absorbing rods into the silica cladding. In this case, the resonant interaction of the core mode with the high-index rod mode could be controlled by fiber bending, which allows for the precise adjustment of the stop-band position. It was shown that the utilization of Sm-doped absorbing rods allows one to achieve very high absorption of emission at unwanted wavelengths, but it also adds background losses for the pump near 915 nm and for the signal at 976 nm. Despite this fact, the improvement of efficiency in the 976 nm fiber amplifier, after shifting the stop-band to 1000 nm, was clearly demonstrated. Based on theoretical calculations, it was shown that, after optimizing the fiber parameters, a further twofold improvement in efficiency was possible despite the excess losses at the pump and signal wavelengths.https://www.mdpi.com/2304-6732/11/1/89spectral filteringYb-doped fiber amplifierfiber optimization976 nm fiber laser |
| spellingShingle | Svetlana S. Aleshkina Danila A. Davydov Vladimir V. Velmiskin Mikhail V. Yashkov Andrey A. Umnikov Sergey V. Alyshev Liudmila D. Iskhakova Mikhail M. Bubnov Denis S. Lipatov Mikhail E. Likhachev Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding Photonics spectral filtering Yb-doped fiber amplifier fiber optimization 976 nm fiber laser |
| title | Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding |
| title_full | Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding |
| title_fullStr | Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding |
| title_full_unstemmed | Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding |
| title_short | Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding |
| title_sort | improvement of efficiency in 976 nm fiber amplifier by spectral filtering in yb doped fiber with absorbing rods embedded in the cladding |
| topic | spectral filtering Yb-doped fiber amplifier fiber optimization 976 nm fiber laser |
| url | https://www.mdpi.com/2304-6732/11/1/89 |
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