Share Email Print
cover

Proceedings Paper

Static modeling for membrane deformable mirror used in high-power laser
Author(s): Peng Wu; Haiqing Chen; Jie Li; Hongbin Yu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The technology of membrane deformable mirror (DMs) that has the potential to achieve comprehensive wavefront compensation and control in high power laser has been developed rapidly in recent years. Experimental results reveal that strong nonlinearity is induced to the deformation of DMs with respect to the square of input voltage when operating voltage is more than 120V. The nonlinear response and strong coupling effect of control channel in DMs make it difficult to obtain the desired mirror surface shapes. A test bed is built up to measure the deformation of DMs driven by specified voltages. An efficient nonlinear model of deformation with respect to input voltages is presented using a back propagation neural network (BPNN). Deformation due to arbitrary actuator voltages applied to actuators to correct wavefront aberration can be calculated directly with a higher precision using the BPNN model proposed. The residual relative error of the proposed model shows the improvement of accuracy of an order about 5 as compared to that of linear model, and with no significant increase of time consumption. A preliminary open-loop control experiment of laser wavefront compensation is performed to exam the validity of applying the proposed BPNN model in laser wavefront compensation application.

Paper Details

Date Published: 29 January 2007
PDF: 6 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62796K (29 January 2007); doi: 10.1117/12.725743
Show Author Affiliations
Peng Wu, Huazhong Univ. of Science and Technology (China)
Haiqing Chen, Huazhong Univ. of Science and Technology (China)
Jie Li, Huazhong Univ. of Science and Technology (China)
Hongbin Yu, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

© SPIE. Terms of Use
Back to Top