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Proceedings Paper

Mode competition in concentric-type multicore fiber lasers combined with large mode area single mode fiber
Author(s): Xiaolei Zhang; Gangding Peng; Xingyu Zhang; Qingpu Wang; Jun Chang; Ping Li; Sasa Zhang
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Paper Abstract

The mode competition mechanism in concentric 4-core and 7-core fiber lasers with large mode area single mode (SM) fiber as in-phase supermode selection component is presented. The coupling coefficient between the fundamental mode in large mode area SM fiber and each supermode in mutlicore fiber is discussed. For individual supermode in multicore fiber, the coupling coefficient is optimized as a function of the core radius of SM fiber as well as the distance between multicore fiber and SM fiber. The optimization results demonstrate that only two supermodes are involved in concentric-type fiber lasing - in-phase and anti-phase supermode, owing to the negligible coupling coefficients of the other supermodes. Furthermore, to achieve the best in-phase supermode selection, the core radius of SM fiber will be optimized for maximum coupling coefficient difference between in-phase supermode and anti-phase supermodes. The numerical results illustrate that in-phase supermode always dominate the output and is the highest when the distance equals zero. Compared to conventional multicore fiber lasers with Talbot cavity, this all-fiber configuration based on large mode area SM fiber has higher-order supermodes more efficiently suppressed and high-brightness output may be achieved.

Paper Details

Date Published: 16 November 2010
PDF: 7 pages
Proc. SPIE 7843, High-Power Lasers and Applications V, 78431L (16 November 2010); doi: 10.1117/12.870245
Show Author Affiliations
Xiaolei Zhang, Shandong Univ. (China)
The Univ. of New South Wales (Australia)
Shandong Provincial Key Lab. of Laser Technology and Applications (China)
Gangding Peng, The Univ. of New South Wales (Australia)
Xingyu Zhang, Shandong Univ. (China)
Shandong Provincial Key Lab. of Laser Technology and Applications (China)
Qingpu Wang, Shandong Univ. (China)
Shandong Provincial Key Lab. of Laser Technology and Applications (China)
Jun Chang, Shandong Univ. (China)
Shandong Provincial Key Lab. of Laser Technology and Applications (China)
Ping Li, Shandong Univ. (China)
Shandong Provincial Key Lab. of Laser Technology and Applications (China)
Sasa Zhang, Shandong Univ. (China)
Shandong Provincial Key Lab. of Laser Technology and Applications (China)


Published in SPIE Proceedings Vol. 7843:
High-Power Lasers and Applications V
Upendra N. Singh; Dianyuan Fan; Jianquan Yao; Robert F. Walter, Editor(s)

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