Sidelobe suppression of spectral response in holographic optical filter
| Autor: | Ken-Yuh Hsu, Alexei K. Zajtsev, Shiuan-Huei Lin |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Holographic grating Main lobe business.industry Holography Photorefractive effect Grating Diffraction efficiency Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optics law Blazed grating Electrical and Electronic Engineering Physical and Theoretical Chemistry business Optical filter |
| Zdroj: | Optics Communications. 190:103-108 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/s0030-4018(01)01067-7 |
| Popis: | In order to suppress sidelobes of holographic filter’s spectral response we propose to use weighting of grating intensity distribution along light propagation. This can be realized in photorefractive material (for example in LiNbO 3 :Fe) by using spatial selective decaying of conventional uniform grating by illumination of light through some transparent mask. Experimental results show that it is able to obtain 8 dB improvement of sidelobe level compared to uniform grating. But it is accompanied by 1.7 times expansion of main lobe and two times decrease of diffraction efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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