| 用于噪声抑制的碘分子滤波瑞利散射技术研究 |
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| 引用本文： | 王晟,刘晶儒,胡志云,张振荣,叶景峰,张立荣,赵新艳,黄梅生. 用于噪声抑制的碘分子滤波瑞利散射技术研究[J]. 光谱实验室, 2011, 28(1): 26-30 |
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| 作者姓名： | 王晟 刘晶儒 胡志云 张振荣 叶景峰 张立荣 赵新艳 黄梅生 |
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| 作者单位： | 西北核技术研究所激光与物质相互作用国家重点实验室; |
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| 摘 要： | 为了解决激光瑞利散射技术诊断燃烧场时存在的米散射和背景杂散光干扰问题,发展了基于碘分子超精细吸收凹陷的滤波技术。介绍了分子滤波的原理和碘分子的吸收光谱,设计了用于产生稳定数密度的碘分子滤波器,并采用种子注入、可调谐Nd：YAG激光器测量了碘分子的吸收谱。采用碘分子滤波器,在稳态燃烧场和瞬态燃烧场上分别进行了结构诊断的滤波瑞利散射实验,获得了清晰的燃烧场结构图像。实验表明碘分子滤波器能够有效抑制532nm激光瑞利散射实验中的米散射和背景杂散光,提高信号图像的清晰度。
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| 关 键 词： | 光谱学 噪声抑制 碘分子滤波器 燃烧诊断 瑞利散射 |
Research on Iodine Filter for Noise Suppression in Rayleigh Scattering |
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| WANG Sheng,LIU Jing-Ru,HU Zhi-Yun,ZHANG Zhen-Rong,YE Jing-Feng,ZHANG Li-Rong,ZHAO Xin-Yan,HUANG Mei-Sheng. Research on Iodine Filter for Noise Suppression in Rayleigh Scattering[J]. Chinese Journal of Spectroscopy Laboratory, 2011, 28(1): 26-30 |
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| Authors: | WANG Sheng LIU Jing-Ru HU Zhi-Yun ZHANG Zhen-Rong YE Jing-Feng ZHANG Li-Rong ZHAO Xin-Yan HUANG Mei-Sheng |
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| Affiliation: | (Northwest Institute of Nuclear Technology,State Key Laboratory of Laser Interaction with Matter,Xi’an 710024,P.R.China) |
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| Abstract: | A filtration technique based on iodine hyperfine absorption was developed in order to improve signal-to-noise of rayleigh scattering signal for rayleigh scattering technique diagnostic in combustion.The iodine filter cell was designed based on principle of molecular filter and theory of iodine absorption to attain steady number density,and iodine absorption spectra were measured.Iodine filter cell was used to filter mie scattering and background noise in order to obtain clear images in stable flame and tran... |
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| Keywords: | Spectroscopy Noise Suppression Iodine Filter Cell Diagnostic in Combustion Rayleigh Scattering |
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