Inverse symmetric Dammann gratings
| Autor: | Quanye Bi, Changhe Zhou, Po Sheun Chung, Zunqi Lin, Wei Jia, Xinglong Xie, Jiangjun Zheng |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
business.industry Phase (waves) Inverse Grating Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Amplitude Optics Reflection (mathematics) law Electrical and Electronic Engineering Physical and Theoretical Chemistry business Phase modulation Diffraction grating Beam splitter |
| Zdroj: | Optics Communications. 282:742-747 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2008.11.063 |
| Popis: | 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 odd-numbered array illumination when the phase modulations are pi or a specific value. Numerical solutions optimized by the steepest-descent algorithm for binary phase and multilevel phases with splitting ratio from I x 4 to 1 x 14 are given. Fabrication of 1 x 6 array without the zero-order intensity and 1 x 7 array with the zero-order intensity are made from the same amplitude mask. A 6 x 6 output without the crossed zero-orders was achieved by crossing two one-dimensional 1 x 6 inverse symmetric Dammann gratings. This grating may have potential value for practical applications. (C) 2008 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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