A Radiation-Balanced Silica Fiber Amplifier
Autor: | Knall, Jennifer M., Engholm, Magnus, Boilard, Tommy, Bernier, Martin, Digonnet, Michel J. F. |
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Rok vydání: | 2021 |
Předmět: | |
Zdroj: | Phys. Rev. Lett. 127, 013903 (2021) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevLett.127.013903 |
Popis: | We report what we believe to be the first radiation-balanced fiber amplifier - a device that provides optical gain while experiencing no temperature rise. The gain medium is a silica fiber with a 21 um-diameter core highly doped with Yb3+ (2.52 wt.%) and co doped with 2.00 wt.% Al to reduce concentration quenching. The amplifier was core-pumped with 1040 nm light to create anti-Stokes fluorescence (ASF) cooling and gain in the core at 1064 nm. Using a custom slow-light FBG sensor with mK resolution, temperature measurements were performed at multiple locations along the amplifier fiber. A 4.35-m fiber pumped with 2.62 W produced 17 dB of gain while the average fiber temperature remained slightly below room temperature. This advancement is a fundamental step toward the creation of ultra-stable lasers necessary to many applications, especially low-noise sensing and high-precision metrology. Comment: 8 pages including the supplementary material (SM). 5 figures in the main text, 2 in the SM |
Databáze: | arXiv |
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