| 秦玉胜,李相贤,韩昕,童晶晶,高闽光,刘淑芬.干涉仪速度波动对光谱信噪比的影响规律研究[J].光电子激光,2022,33(5):449~457 |
| 干涉仪速度波动对光谱信噪比的影响规律研究 |
| Study on the influence of interferometers velocity fluctuation on the spectral s ignal-to-noise ratio |
| 投稿时间：2021-09-26 |
| DOI： |
| 中文关键词: 干涉仪 速度波动 光谱仪 波数 信噪比 |
| 英文关键词:interferometer velocity fluctuation spectrometer wavenumber signal-to-nois e ratio |
| 基金项目:国家自然科学基金(42075135)和安徽省重点研究与开发计划项目(202104a05020026)资助项目 (1.中国科学院合肥物质科学研究院安徽光学精密机械研究所,安徽 合肥 230031; 2.中国 科学技术大学,安徽 合肥 230026; 3.山东省泰安生态环境监测中心,山东 泰安 271000) |
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| 中文摘要: |
| 干涉仪速度波动是影响光谱信噪比的重要因素之 一,为了进一步提高光谱信噪比 ,对干涉仪速度波动与光谱信噪比 之间的关系进行了研究。文中从旋转角度、反馈速度测量、电路噪声等方面定量分析了倾斜 式干涉仪光程差速度波动的成因, 在此基础上,通过理论分析和实验验证了光程差速度不稳定性对光谱信噪比的影响规律。实 验结果表明,在同一波数区间,光 程差速度稳定性越高,光谱信噪比越好,速度稳定性提高5%时,光谱信噪比提高约14%—16%。当光程差速度恒定时,低波数段 的光谱信噪比明显优于高波数段,2100200 c m－1波段比2500600 cm－1波段的信噪 比高约20%。该研究成果为高信噪比光谱仪的设计提供了理论基础。 |
| 英文摘要: |
| The velocity fluctuation of the interferometer is one of the important factors affecting the spectral signal-to-noise ratio.To further improve the spectral signal-to-noise ratio ,the relationship between the velocity fluctuation of the interferometer and the spectral signal-to-noise ratio is studied.In th is paper,the causes of optical path difference velocity fluctuation of the tilt compensation interferometer are quantitatively analyzed from the aspects of rotation angle, velocity feedback testing,and circuit noise.On this basis,the influence law of optical path difference velocity instability on the spectral signal-to-noise ratio is verified through theoreti cal analysis and experiments.The experimental results show that in the same wavenumber range,the higher the velocity stabilit y of optical path difference,the better the spectral signal-to-noise ratio.When the velocity stability is increased by 5% ,the spectral signal-to-noise ratio is increased by about 14%—16%.When the optical path difference velocity is constant,the spe ctral signal-to-noise ratio in the low wavenumber band is significantly better than that in the high wavenumber band,a nd the signal-to-noise ratio in the 2100—2200cm－1 band is about 20% h igher than that in the 2500—2600cm－ 1 band.The research results provide a theoretical basis for the design of a high signal-to-noise ratio spectrometer. |
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