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18 June 2002 Novel spectral device based on volume holography for integrated and miniature spectrometers
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Proceedings Volume 4640, Integrated Optics: Devices, Materials, and Technologies VI; (2002)
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
Miniature spectrometers are widely researched now, for their advantages such as compact size, stability and low cost promise a vast application field of spectral systems. The device for dispersion and imaging plays a key role in miniaturization of spectrometers because it is the most important part. In this paper, a kind of novel device based on volume holography is presented, which is intended for miniature and integrated spectrometer. The principles and design method of this device are far different from those of conventional gratings used in spectrometers. By the volume holographic multiplexing technology, the device is completed with several volume gratings recorded in it. Due to the Bragg wavelength selectivity of volume holography, every grating in the device works for just one designed wavelength and does not interfere with each other. So to some extents, the design can be considered as a combination of several detached gratings and the dispersion angle of every designed wavelength could be freely determined by design requirements. In order to record volume gratings that work at different wavelengths at just one recording wavelength, single-wavelength Bragg angle-compensating recording method is used. A device working at eight discrete wavelengths is designed and an optical setup is fabricated to implement it. A Fe:LiNbO3 crystal is employed as the recording material. Experiments for verifying the device are done and it is found that the device is available.
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Hua Long, Qingsheng He, Minxian Wu, and Guofan Jin "Novel spectral device based on volume holography for integrated and miniature spectrometers", Proc. SPIE 4640, Integrated Optics: Devices, Materials, and Technologies VI, (18 June 2002);

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