A 1.8 kW fiber laser oscillator employing a section of spindle-shaped core ytterbium-doped fiber,Laser Physics Letters

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A 1.8 kW fiber laser oscillator employing a section of spindle-shaped core ytterbium-doped fiber
Laser Physics Letters ( IF 1.7 ) Pub Date : 2020-08-05 , DOI: 10.1088/1612-202x/aba62d
Lingfa Zeng ₁ , Xiaoming Xi _{1,

2,

3} , Yun Ye ₁ , Xiaolin Wang _{1,

2,

3} , Baolai Yang _{1,

2,

3} , Zhiyong Pan _{1,

2,

3} , Chen Shi _{1,

2,

3} , Hanwei Zhang _{1,

2,

3} , Peng Wang _{1,

2,

3} , Zefeng Wang _{1,

2,

3} , Pu Zhou _{1,

2,

3} , Xiaojun Xu _{1,

2,

3}

Affiliation

We propose and demonstrate a new type of Yb-doped fiber called spindle-shaped core ytterbium-doped fiber (SSCYDF) and conduct a laser oscillator based on this fiber. The SSCYDF is a kind of long tapered fiber which consists of a small-core section at both ends and a large-core section in the middle. The ratio of core/clad diameter remains a constant along the total length of the SSCYDF (∼31 m). The core/clad diameter of the small-core sections at both ends is 20/400 μ m with a length of about 3.5 m, and the corresponding value of the large-core section in the middle is 30/600 μ m and 6 m. The laser oscillator performance is investigated with pump wavelength of 976 nm. When the pump source is employed by a counter-pumping scheme, a maximum output power of 1836 W is achieved, with an optical-to-optical efficiency of 83.5%. The beam quality ( M 2 factor) measured at the operation of 1836 W is 1.65. The laser oscillator based on SSCYDF holds the advantag...

中文翻译：

1.8 kW光纤激光振荡器，采用一部分纺锤形掺core光纤

我们提出并演示了一种新型的Yb掺杂光纤，称为纺锤形纤芯掺fiber光纤（SSCYDF），并基于该光纤进行了激光振荡器。SSCYDF是一种长锥形纤维，由两端的小芯段和中间的大芯段组成。芯/包层直径之比沿SSCYDF的总长度（〜31 m）保持恒定。两端的小铁心部分的铁心/包层直径为20/400μm，长度约为3.5 m，中间的大铁心部分的对应值为30/600μm和6 m 。在泵浦波长为976 nm的情况下研究了激光振荡器的性能。当通过反向泵浦方案使用泵浦源时，可实现1836 W的最大输出功率，光对光效率为83.5％。在1836 W的操作下测得的光束质量（M 2因子）为1.65。基于SSCYDF的激光振荡器具有优势...

更新日期：2020-08-06

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