为解决传统拉曼光谱信号强度弱、信噪比低的问题，本文提出一种新型的共聚焦拉曼系统，通过外接光子晶体光纤实现共聚焦点的绝对共轭，总结了光子晶体光纤耦合过程中出现的技术问题，并对实际样品进行测试。与Thorlabs、OZ两种常规共聚焦拉曼系统所用光纤、Witec 532 nm-alpha300R拉曼系统进行比较，在相同激光强度和积分时间下，本文信噪比为73.8382，显著高于Thorlabs、OZ两种光纤的37.1557和40.0342，而相较于Witec 532 nm-alpha300R的65.5312，也提升了12.68%，高质量的拉曼信号使得该绝对共轭共聚焦拉曼系统具有广阔的市场前景和超高的市场竞争力。

To solve the problems of weak signal strength and low signal-to-noise ratio in traditional Raman spectroscopy, a new confocal Raman system is proposed in this paper. The absolute conjugation of the confocal point is realized by external photonic crystal fiber. The technical problems in the coupling process of photonic crystal fiber are summarized, and the actual samples are tested. Compared with conventional confocal Raman fibers such as Thorlabs and OZ and Witec 532 nm-alpha300R Raman system, the signal-to-noise ratio in this paper is 73.8382 at the same laser intensity and integration time, which is significantly higher than that of Thorlabs and OZ (37.1557 and 40.0342, respectively). Compared with the signal-to-noise ratio of 65.5312 for Witec 532 nm-alpha300R, it also increased by 12.68%. High-quality Raman signal makes the absolute conjugated confocal Raman system have broad market prospects and ultra-high market competitiveness.