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Optical Engineering

Imaging spectral device based on multiple volume holographic gratings
Author(s): Liangcai Cao; Xiaosu Ma; Qingsheng He; Hua Long; Minxian Wu; Guofan Jin
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Paper Abstract

A spectral device based on multiple holographic gratings is proposed. Several volume holograms are superimposed into a common volume of photorefractive crystal Fe:LiNbO3 using the wavelength and angular multiplexing method. This device is implemented by only one single wavelength laser using a two-lambda method. The imaging function of the device is realized with convergent recording beams. It can reduce the spectral system because the focusing lens is removed. Because the diffraction efficiency and the spectral resolution of the superimposed volume holographic gratings could be very high, the spectral device could achieve attracting characteristics of the diffraction efficiency and spectral resolution. Theoretical analysis and model design are presented and a discrete spectral device working at four wavelengths is demonstrated. The device has a uniform diffraction efficiency of 10% and the resolution of 1 to 2 nm. In addition, it has the advantages of wide spectral coverage, simple structure, and flexible design.

Paper Details

Date Published: 1 September 2004
PDF: 8 pages
Opt. Eng. 43(9) doi: 10.1117/1.1775231
Published in: Optical Engineering Volume 43, Issue 9
Show Author Affiliations
Liangcai Cao, Tsinghua Univ. (China)
Xiaosu Ma, Tsinghua Univ. (China)
Qingsheng He, Tsinghua Univ. (China)
Hua Long, Tsinghua Univ. (China)
Minxian Wu, Tsinghua Univ. (China)
Guofan Jin, Tsinghua Univ. (China)

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