1.上海理工大学 光电信息与计算机工程学院,上海 200093
2.上海理工大学 上海市现代光学系统重点实验室,上海 200093
谭莉莉(1997— ),女,硕士研究生,从事光学设计研究。tanlili1005@163.com
郭汉明(1977— ),男,教授,从事超分辨光学显微成像和光谱技术方面的研究。 hmguo@usst.edu.cn
收稿:2024-12-09,
修回:2025-01-12,
纸质出版:2025-07-20
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谭莉莉,杨照清,傅伟等.多光纤阵列输入高分辨率微型拉曼光谱仪设计[J].光学技术,2025,51(04):468-473.
TAN Lili,YANG Zhaoqing,FU Wei,et al.Design of a High-resolution miniature raman spectrometer with Multi-fiber array input[J].OPTICAL TECHNIQUE,2025,51(04):468-473.
研究针对传统光谱仪采用单根光纤入射导致像面利用率不足、拉曼散射光探测能量弱的问题,提出了一种基于多光纤阵列输入的高分辨率光谱仪设计。通过沿狭缝弧矢方向排列七根入射光纤作为入射光源,并结合柱透镜与像散校正理论对光路进行优化。该系统采用785nm激发波长,可在七个视场内实现170~3200cm
-1
宽光谱覆盖,全波段分辨率达到7cm
-1
。实验结果表明,相较于单根光纤入射时72%的像面利用率,集束光纤结合柱透镜的设计将光谱仪像面利用率显著提升至97%,且各光纤传输能量在像面上分布均匀。该方案为需要高能量探测效率和强度的应用场景提供了可行方案。
In this study
a high-resolution spectrometer with a multi-fiber array input design is proposed to address the issue of weak Raman-scattered light detection energy caused by insufficient image plane utilization in conventional spectrometers that use a single optical fiber as the incident light source. The design optimizes the optical path by arranging seven incident optical fibers along the sagittal direction of the s
lit and incorporating a cylindrical lens for astigmatism correction. The system employs a 785 nm excitation wavelength and achieves a broad spectral coverage of 170~3200 cm
-1
across seven fields of view
achieving a full-band resolution of 7 cm
-1
. Experimental results demonstrate that
compared to the 72% image plane utilization achieved with a single fiber configuration
the proposed design—featuring clustered fibers combined with a cylindrical lens significantly improves the image plane utilization to 97%
while maintaining uniform energy distribution across the image plane. This solution offers an effective approach for applications demanding high energy detection efficiency and intensity.
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