Share Email Print
cover

Proceedings Paper

Multimode fiber modal decomposition based on hybrid genetic global optimization algorithm
Author(s): Lei Li; Jinyong Leng; Pu Zhou; Jinbao Chen
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Numerical modal decomposition (MD) is an effective approach to reveal modal characteristics in high power fiber lasers. The main challenge is to find a suitable multi-dimensional optimization algorithm to reveal exact superposition of eigenmodes, especially for multimode fiber. A novel hybrid genetic global optimization algorithm, named GA-SPGD, which combines the advantages of genetic algorithm (GA) and stochastic parallel gradient descent (SPGD) algorithm, is firstly proposed to reduce local minima possibilities from sensitivity initial values. Firstly, GA is applied to search the rough global optimization position based on near-far-field intensity distribution with high accuracy. Upon those initial values, SPGD algorithm is afterwards used to find the exact optimization values based on near-field intensity distribution with fast convergence speed. Numerical simulations validate the feasibility and reliability.

Paper Details

Date Published: 24 October 2017
PDF: 10 pages
Proc. SPIE 10457, AOPC 2017: Laser Components, Systems, and Applications, 104572K (24 October 2017); doi: 10.1117/12.2284903
Show Author Affiliations
Lei Li, National Univ. of Defense Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Jinyong Leng, National Univ. of Defense Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Pu Zhou, National Univ. of Defense Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Jinbao Chen, National Univ. of Defense Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)


Published in SPIE Proceedings Vol. 10457:
AOPC 2017: Laser Components, Systems, and Applications
Shibin Jiang; Lijun Wang; Lan Jiang; Long Zhang, Editor(s)

© SPIE. Terms of Use
Back to Top