| 移频激发差分拉曼光谱仪的多波长光源设计 |
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| 引用本文： | 周红武,蔡志坚,吴建宏.移频激发差分拉曼光谱仪的多波长光源设计[J].半导体光电,2013,34(3):396-400. |
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| 作者姓名： | 周红武 蔡志坚 吴建宏 |
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| 作者单位： | 苏州大学信息光学工程研究所,江苏苏州,215006 |
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| 基金项目： | 江苏省高校自然科学基金项目（12KJB460007）. |
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| 摘 要： | 拉曼光谱检测常常受到荧光的干扰,影响了该技术的推广应用。移频激发差分拉曼光谱方法(SERDS方法)已被证明是一种有效的荧光抑制方法。SERDS实现荧光抑制的关键在于其特殊的激光光源,不仅要求其输出多个相近的波长,而且要求输出的激光功率较高、光谱线宽窄。采用Littrow光栅外腔半导体激光器原理设计实现了一种低成本、便携式的激光光源,可以在15nm的调谐范围内输出多个波长,光谱线宽小于0.2nm,输出功率可达80mW,适合用作移频激发差分拉曼光谱方法的多波长光源,实现拉曼光谱检测中对荧光干扰的抑制。
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| 关 键 词： | 荧光抑制 移频激发差分拉曼光谱 外腔半导体激光器 |
| 收稿时间： | 2012/11/1 0:00:00 |
Design of Multi wavelength Light Source for Shifted Excitation Raman Difference Spectroscopy |
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| ZHOU Hongwu,CAI Zhijian,WU Jianhong.Design of Multi wavelength Light Source for Shifted Excitation Raman Difference Spectroscopy[J].Semiconductor Optoelectronics,2013,34(3):396-400. |
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| Authors: | ZHOU Hongwu CAI Zhijian WU Jianhong |
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| Affiliation: | Institute of Information Optical Engineering, Soochow University, Suzhou 215006, CHN;Institute of Information Optical Engineering, Soochow University, Suzhou 215006, CHN;Institute of Information Optical Engineering, Soochow University, Suzhou 215006, CHN |
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| Abstract: | The application of Raman spectroscopy is often limited by fluorescence disturbances. Shifted excitation Raman difference spectroscopy (SERDS) has been proven to be an effective method for fluorescence rejection. The key of SERDS based fluorescence suppression lies on its special laser source. It is required not only to generate several close spaced wavelengths, but also to get high power and narrow spectral line width. In this paper, a low cost, portable external cavity diode laser based on Littrow structure is proposed and implemented. A wavelength tuning range of 15nm can be achieved with spectral line width less than 0.2nm, and the output laser power is up to 80mW. Such features make it suitable for SERDS light source to realize fluorescence suppression in Raman spectroscopy. |
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| Keywords: | fluorescence suppression shifted excitation Raman difference spectroscopy external cavity diode laser |
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