Annular flat-top laser beam generated by an adaptive weight FFT-based iterative algorithm

Dong Wang; Xiang Liu; Hao Wang; Jian Zhang; Liying Wu

doi:10.1117/12.2012855

31 January 2013 Annular flat-top laser beam generated by an adaptive weight FFT-based iterative algorithm

Dong Wang, Xiang Liu, Hao Wang, Jian Zhang, Liying Wu

Proceedings Volume 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation; 875938 (2013) https://doi.org/10.1117/12.2012855
Event: International Symposium on Precision Engineering Measurement and Instrumentation 2012, 2012, Chengdu, China

Abstract

The generation of a variable diameter annular flat-top laser beam in the far field based on an adaptive weight FFT-based iterative algorithm (AWFFT-IA) and a phase only liquid crystal spatial light modulators (poLCSLM) is demonstrated. The iterative algorithm is used to design the needed phase distribution written on the poLCSLM for the target diameter annular flat-top laser beam shaping. The experimental results show that the method proposed can concentrates about 71% of the incident laser energy into the desired region and the root mean square error (RMSE) of the tailored flat-top intensity profile is more or less 12%.

Citation Download Citation

Dong Wang, Xiang Liu, Hao Wang, Jian Zhang, and Liying Wu "Annular flat-top laser beam generated by an adaptive weight FFT-based iterative algorithm", Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 875938 (31 January 2013); https://doi.org/10.1117/12.2012855

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