Widely Tunable Dual-Wavelength Fiber Laser in the 2 μm Wavelength Range
Widely Tunable Dual-Wavelength Fiber Laser in the 2 μm Wavelength Range
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DOI：
10.1109/jlt.2019.2902076
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发表时间：
2019-05-15
影响因子：
4.7
通讯作者：
Roy, Philippe
中科院分区：
文献类型：
--
作者：
Sabra, Mostafa;Leconte, Baptiste;Roy, Philippe
在本文中，我们展示了一个宽调谐双波长光纤激光器，这是基于掺铥光纤和体布拉格光栅触发的发射波长在2 μ m波段。实验表明，该激光器的波长分离范围为1 ~ 144 nm（0.08-11.47 THz），连续可调，输出功率大于4.5 W。的激光发射表现出的线宽（FWHM）低于0.1 nm的独立于波长和Δ λ，具有超过45 dB的信噪比对比度。对于较短的Δ λ（1-14 nm）获得了7 W的最大输出功率，对应于相对于790 nm处的入射泵浦功率的33%的斜率效率。
In this paper, we demonstrate a widely tunable dual-wavelength fiber laser, which is based on a thulium-doped fiber and volume Bragg gratings triggering the emission wavelengths in the 2-mu m band. A continuously tunable wavelength separation range (Delta lambda), from 1 to 144 nm (0.08-11.47 THz) is demonstrated, with > 4.5 W of output power over the tuning range. The laser emission exhibits a linewidth (FWHM) lower than 0.1 nm independent from wavelengths and Delta lambda, with more than 45 dB of a signal-to-noise contrast. A maximum output power of 7 W is obtained for shorter Delta lambda (1-14 nm), corresponding to a slope efficiency of 33% with respect to the incident pump power at 790 nm.