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Fibers 2013, 1(3), 82-92; doi:10.3390/fib1030082

Heavily Tm3+-Doped Silicate Fiber for High-Gain Fiber Amplifiers

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Received: 4 November 2013; in revised form: 26 November 2013 / Accepted: 27 November 2013 / Published: 3 December 2013
(This article belongs to the Special Issue Advances on Optical Fibers)
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Abstract: We report on investigation the potential of a 7 wt% (8.35 × 1020 Tm3+/cm3) doped silicate fibers for high-gain fiber amplifiers. Such a high ion concentration significantly reduces the required fiber length of high-power 2 μm fiber laser systems and allows the high-repetition rate operation in 2 μm mode-locked fiber lasers. To evaluate the feasibility of extracting high gain-per-unit-length from this gain medium, we measure several key material properties of the silicate fiber, including the absorption/emission cross-sections, upper-state lifetime, fiber background loss, and photodarkening resistance. We show through numerical simulations that a signal gain-per-unit-length of 3.78 dB/cm at 1950 nm can be achieved in a watt-level core-pumped Tm3+-doped silicate fiber amplifier. In addition, an 18-dB 2013-nm amplifier is demonstrated in a 50-cm 7 wt% Tm3+-doped double-clad silicate fiber. Finally, we experimentally confirm that the reported silicate host exhibits no observable photodarkening.
Keywords: Thulium; silicate fiber; fiber laser; fiber amplifiers Thulium; silicate fiber; fiber laser; fiber amplifiers
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lee, Y.-W.; Chien, H.-W.; Cho, C.-H.; Chen, J.-Z.; Chang, J.-S.; Jiang, S. Heavily Tm3+-Doped Silicate Fiber for High-Gain Fiber Amplifiers. Fibers 2013, 1, 82-92.

AMA Style

Lee Y-W, Chien H-W, Cho C-H, Chen J-Z, Chang J-S, Jiang S. Heavily Tm3+-Doped Silicate Fiber for High-Gain Fiber Amplifiers. Fibers. 2013; 1(3):82-92.

Chicago/Turabian Style

Lee, Yin-Wen; Chien, Han-Wei; Cho, Che-Hung; Chen, Ju-Zhe; Chang, Juin-Shin; Jiang, Shibin. 2013. "Heavily Tm3+-Doped Silicate Fiber for High-Gain Fiber Amplifiers." Fibers 1, no. 3: 82-92.

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