Experimental demonstration of transverse mode instability enhancement by a counter-pumped scheme in a 2 kW all-fiberized laser

Zebiao Li; Zhihua Huang; Xiaoyu Xiang; Xiaobao Liang; Honghuan Lin; Shanhui Xu; Zhongmin Yang; Jianjun Wang; Feng Jing

doi:10.1364/PRJ.5.000077

Journals >Photonics Research >Volume 5 >Issue 2 >Page 77 > Article

Photonics Research
Vol. 5, Issue 2, 77 (2017)

Experimental demonstration of transverse mode instability enhancement by a counter-pumped scheme in a 2 kW all-fiberized laser

Zebiao Li^1、2, Zhihua Huang², Xiaoyu Xiang², Xiaobao Liang², Honghuan Lin², Shanhui Xu^1、3、4, Zhongmin Yang^{1、3、4、*}, Jianjun Wang², and Feng Jing²

Author Affiliations

¹State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China

²Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

³Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, South China University of Technology, Guangzhou 510640, China

⁴Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510640, China

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DOI: 10.1364/PRJ.5.000077 Cite this Article Set citation alerts

Zebiao Li, Zhihua Huang, Xiaoyu Xiang, Xiaobao Liang, Honghuan Lin, Shanhui Xu, Zhongmin Yang, Jianjun Wang, Feng Jing. Experimental demonstration of transverse mode instability enhancement by a counter-pumped scheme in a 2 kW all-fiberized laser[J]. Photonics Research, 2017, 5(2): 77 Copy Citation Text

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Abstract

Transverse mode instability (TMI) has become the major limitation for power scaling of fiber lasers with nearly diffraction-limited beam quality. Compared with a co-pumped fiber laser, a counter-pumped fiber laser reveals TMI threshold enhancement through a semi-analytical model calculation. We demonstrated a 2 kW high-power counter-pumped all-fiberized laser without observation of TMI. Compared with the co-pumped scheme, the TMI threshold is enhanced at least 50% in counter-pumped scheme, moreover, stimulated Raman scattering and four-wave mixing are suppressed simultaneously.

Keywords

Fiber optics amplifiers and oscillators Instabilities and chaos Thermal effects