| 光谱学与光谱分析 |
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| General Calculation Method of Diffraction Efficiency of Concave Blazed Gratings |
| LI Ting1, HUANG Yuan-shen1*, XU Bang-lian1, LI Bai-cheng1, ZHANG Da-wei1, 2, TAO Chun-xian1, LING Jin-zhong1, ZHUANG Song-lin1 |
1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore |
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Abstract In order to make diffraction energy of concave gratings more concentrated in the desired order, the present paper puts forward that the concave blazed grating with variable groove angles could be fabricated on the concave substrates by mechanical ruling method, and the theoretical method of simultaneously calculating the diffraction efficiency in the main section and non-main section is deduced by using Fresnel-Kirchhoff’s diffraction formula, which makes up the shortage of the diffraction efficiency calculated only in the main section. Finally, the diffraction efficiency curves varied with wavelength is simulated by Matlab software, and the variation laws of the diffraction efficiency are compared for different production methods and application parameters, which provides a valuable reference for the design and production of the concave gratings.
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Received: 2012-11-26
Accepted: 2013-03-04
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Corresponding Authors:
HUANG Yuan-shen
E-mail: hyshyq@sina.com
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