Collection Of theses on high power laser and plasma physics, 2009, 7 (1): 0742, Published Online: Jun. 2, 2017  

Inverse symmetric Dammann gratings

Author Affiliations
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, No. 390, Qinghe Road, Jiading, Shanghai 201800, People’s Republic of China
2 City University of Hong Kong, Hong Kong
Abstract
Inverse symmetric Dammann grating is a special grating, whose transition points are reflection symmetric about the midpoint with inverse phase offset in one period. It can produce even-numbered or oddnumbered array illumination when the phase modulations are p or a specific value. Numerical solutions optimized by the steepest-descent algorithm for binary phase and multilevel phases with splitting ratio from 1 × 4 to 1 × 14 are given. Fabrication of 1 × 6 array without the zero-order intensity and 1 × 7 array with the zero-order intensity are made from the same amplitude mask. A 6 × 6 output without the crossed zero-orders was achieved by crossing two one-dimensional 1 × 6 inverse symmetric Dammann gratings. This grating may have potential value for practical applications.

Qunyu Bi, Changhe Zhou, Jiangjun Zheng, Wei Jia, Xinglong Xie, Zunqi Lin, P.S. Chung. Inverse symmetric Dammann gratings[J]. Collection Of theses on high power laser and plasma physics, 2009, 7(1): 0742.

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