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Background and objectivesLaser skin therapy and intense pulsed light (IPL) therapy are both light-based treatments used for various skin concerns. They have been used since decades and each system have their own specificity, advantages, and drawbacks. However specific treatment is still not accessible with standard techniques due to difficulties having a source with both laser and IPL advantages. We describe a new concept, the fibered luminescent concentrator—FLC, based on luminescent concentrators capable of concentrating spectrally and spatially an IPL source, resulting in a multi-color fibered device.Study design/materials and methodsThe FLC utilizes luminescent materials arranged in parallelepiped shapes polished on all faces. The IPL broadband spectrum is absorbed by the luminescent molecules and is re-emitted to a red shifted wavelength. The emitted spectral bandwidth ranges from green to dark red, depending on the type of luminescent concentrator. This light is then spatially concentrated by total internal reflections in the parallelepiped and guided through a fiber to the final operator.ResultsWe have developed three different solid luminescent concentrators based on a transparent polymer sheet (PMMA) doped with luminescent organic dye molecules for yellow and red emission, and an alexandrite crystal for emission in the dark red spectrum. We demonstrate that our new non-laser FLC device can concentrate spectrally and spatially the light with no temporal deformation and offers real opportunities for treatments where the IPL is less well-adapted.ConclusionThe FLC is an additional tool for existing conventional systems such as laser or IPL sources. It is easily adaptable to any IPL source and is a very good complement, especially for wavelengths where the laser cannot easily produce light, such as the yellow band.

研究背景与目的：激光皮肤治疗与强脉冲光（intense pulsed light, IPL）治疗均为针对各类皮肤问题的光疗手段，已应用数十年，各系统均具备独特性、优势与局限。然而，由于难以获得同时兼具激光与IPL优势的光源，标准技术仍无法实现部分针对性治疗。本研究介绍一种全新概念——纤维式发光聚光器（fibered luminescent concentrator, FLC），该装置基于发光聚光器技术，可对IPL光源进行光谱与空间聚光，最终得到多色光纤式设备。
研究设计/材料与方法：FLC采用各面均经过抛光处理的平行六面体形发光材料。IPL宽带光谱被发光分子吸收后，会重新发射至红移波长；根据发光聚光器的类型不同，发射光谱带宽覆盖绿光至深红色区间。该光线随后通过平行六面体内部的全内反射实现空间聚光，并通过光纤传导至最终操作终端。
研究结果：本研究开发了三款基于透明聚合物板材（聚甲基丙烯酸甲酯，PMMA）的固态发光聚光器，分别掺杂可发射黄、红光的有机染料分子，以及可发射深红色光谱的变石（alexandrite）晶体。实验证明，这款新型非激光FLC设备可对光线实现光谱与空间聚光，且无时间形变，为IPL适配性较差的治疗场景提供了切实可行的解决方案。
结论：FLC可作为现有传统系统（如激光或IPL光源）的补充工具，可轻松适配任意IPL光源，是极佳的补充方案，尤其适用于激光难以高效产生光线的波长区间，例如黄色波段。