当前位置: X-MOL 学术Laser Phys. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Thermally stable laser-driven phosphor converted white light source using multilayer structured diffuser system
Laser Physics Letters ( IF 1.7 ) Pub Date : 2020-11-19 , DOI: 10.1088/1612-202x/abc759
Atul Kumar Dubey , Virendra Kumar , Mayank Gupta , Dalip Singh Mehta

We report the development of a thermally stable laser-driven phosphor-converted white light source using a multilayer structured diffuser system for general illumination. The developed extended diffuser system comprises an acrylic sheet, two glass plates, and a phosphor layer with the arrangement in a glass-acrylic-phosphor-glass combination. The high-power laser beam was gradually distributed inside the diffuser system for exciting the phosphor layer optimally without burning the resin and thermal quenching. The method is simple and efficient in which both the directionality and scattering properties of laser source are exploited using the transmission properties of diffusers. The high specular transmission of diffusers resulted in the optimum transfer of laser directional photons for exciting the middle section of phosphor layer, and the remaining laser photons were scattered from diffuser surfaces. The glass-acrylic combination results the refractive index inhomogeneity inside the system and helped to expand the scattered photons throughout the phosphor layer. The radiant power distribution of blue laser source inside the system resulted in synchronization between optimal absorption quantum efficiency and fluorescent conversion quantum efficiency of the phosphor layer. As a result, the thermal quenching effect on phosphor inside the white light system was minimized for efficient illumination. With this geometry, a bright and thermally stable white light source was realized due to the proper distribution of high-power laser throughout the system. The luminescence properties of the proposed laser-based white light system were examined and found thermally stable in terms of spectral changes, luminance, and correlated color temperature.



中文翻译:

使用多层结构的漫射器系统的热稳定激光驱动的磷光体转换白光源

我们报告了使用多层结构的漫射器系统进行一般照明的热稳定激光驱动的磷光体转换白光源的发展。开发的扩展扩散器系统包括丙烯酸板,两个玻​​璃板和一个荧光粉层,该荧光粉层以玻璃-丙烯酸-荧光粉-玻璃的组合布置。大功率激光束逐渐散布在扩散器系统内部,以最佳方式激发荧光粉层,而不会燃烧树脂和热淬火。该方法简单而有效,其中利用扩散器的透射特性来利用激光源的方向性和散射特性。漫反射镜的高镜面透射率导致了激光定向光子的最佳传输,从而激发了荧光粉层的中间部分,剩余的激光光子从扩散器表面散射。玻璃与丙烯酸的结合会导致系统内部的折射率不均匀,并有助于使散射的光子扩展到整个荧光粉层。系统内部蓝色激光源的辐射功率分布导致荧光粉层的最佳吸收量子效率和荧光转换量子效率之间的同步。结果,对白光系统内部的磷光体的热猝灭效应被最小化以实现有效的照明。通过这种几何结构,由于高功率激光在整个系统中的正确分布,因此实现了明亮且热稳定的白光源。

更新日期:2020-11-19
down
wechat
bug