Le Blanc Catherine, Perrot Jean-Luc, Balembois François
Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, Université Paris-Saclay, Palaiseau, France.
Department of Dermatology, University Hospital of Saint Etienne, Saint-Etienne, France.
PLoS One. 2024 Dec 18;19(12):e0311425. doi: 10.1371/journal.pone.0311425. eCollection 2024.
Laser 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 METHODS: The 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.
We 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.
The 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.
激光皮肤治疗和强脉冲光（IPL）治疗都是用于解决各种皮肤问题的光基治疗方法。它们已经使用了数十年，每种系统都有其自身的特性、优点和缺点。然而，由于难以获得兼具激光和IPL优点的光源，标准技术仍无法实现特定的治疗。我们描述了一种基于发光聚光器的新概念——纤维发光聚光器（FLC），它能够在光谱和空间上对IPL光源进行聚光，从而产生一种多色纤维装置。
研究设计/材料与方法：FLC利用排列成六面体形状且各面都经过抛光的发光材料。IPL宽带光谱被发光分子吸收，并重新发射到红移波长。发射光谱带宽从绿色到深红色不等，这取决于发光聚光器的类型。然后，这种光通过六面体内的全内反射在空间上被聚光，并通过光纤引导至最终的操作人员。
我们基于掺杂了用于黄色和红色发射的发光有机染料分子的透明聚合物片（聚甲基丙烯酸甲酯，PMMA）以及用于深红色光谱发射的变石晶体，开发了三种不同的固体发光聚光器。我们证明，我们新的非激光FLC装置能够在光谱和空间上对光进行聚光，且没有时间变形，为IPL不太适用的治疗提供了真正的机会。
FLC是现有传统系统（如激光或IPL光源）的一种附加工具。它易于适配任何IPL光源，是一种非常好的补充，特别是对于激光难以轻易产生光的波长，如黄色波段。
