材料科学
光纤激光器
光学
光纤布拉格光栅
激光阈值
激光器
光电子学
色散位移光纤
波长
纤维
光纤传感器
物理
复合材料
作者
Fang Liu,Pei Liu,Xi Feng,Changle Wang,Zhijun Yan,Zhaowei Zhang
出处
期刊:Optics Express
[The Optical Society]
日期:2019-03-07
卷期号:27 (6): 8283-8283
被引量:14
摘要
We present a continuously tunable thulium(Tm)-doped fiber laser operating in the important 2.1 μm region, which is tandem-pumped by another Tm-doped fiber laser at 1908 nm. The advantages of pumping a Tm-doped fiber laser at the long-wavelength absorption tail (>1900 nm) of the fiber include a reduced quantum-defect, and efficient suppression of the amplified spontaneous noise (and potential parasitic lasing) at the short-wavelength region. This facilitates attainment of stable lasing operation in the long-wave emission tail of the Tm fiber at ~2.1 μm. By rotating a diffraction grating inside the Tm fiber laser cavity, we experimentally achieved a wavelength-tuning range of 2000-2172 nm. At central wavelengths of 2050 nm, 2150 nm, and 2172 nm, the slope efficiencies were 23%, 16%, and 9.9%, respectively. To the best of our knowledge, this is the first demonstration of long-wavelength operation of a Tm fiber laser system tandem-pumped at >1900 nm.
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