2 μm mode-locking laser performances of sol-gel-fabricated large-core Tm-doped silica fiber |
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引用本文: | 任艳,覃治鹏,谢国强,乔桢,海婷,袁鹏,马金贵,钱列加,王世凯,于春雷,胡丽丽.2 μm mode-locking laser performances of sol-gel-fabricated large-core Tm-doped silica fiber[J].Chinese Optics Letters,2018(2). |
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作者姓名: | 任艳 覃治鹏 谢国强 乔桢 海婷 袁鹏 马金贵 钱列加 王世凯 于春雷 胡丽丽 |
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摘 要: | High-power ultrafast fiber lasers operating at the 2 μm wavelength are extremely desirable for material processing, laser surgery, and nonlinear optics. Here we fabricated large-core(LC) double-cladding Tm-doped silica fiber via the sol-gel method. The sol-gel-fabricated Tm-doped silica(SGTS) fiber had a large core diameter of 30 μm with a high refractive index homogeneity(Δn=2 × 10~(-4)). With the newly developed LC SGTS fiber as the gain fiber, high-power mode-locking was realized. By using a semiconductor saturable absorber mirror(SESAM) as a mode locker, the LC SGTS fiber oscillator generated mode-locked pulses with an average output power as high as 1.0 W and a pulse duration of 23.9 ps at the wavelength of 1955.0 nm. Our research results show that the self-developed LC Tm-doped silica fiber via the sol-gel method is a promising gain fiber for generating high-power ultrafast lasers in the 2 μm spectral region.
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