Kumar Bhupesh, Schulz Sebastian A, Sebbah Patrick
Opt Express. 2024 Jan 29;32(3):4317-4326. doi: 10.1364/OE.505162.
We demonstrate temperature-controlled spectral tunability of a partially-pumped single-wavelength random laser in a solid-state random laser based on DCM [4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran] doped PMMA (polymethyl methacrylate) dye. By carefully shaping the spatial profile of the pump, we first achieve a low-threshold, single-mode random lasing with an excellent side lobe rejection. Notably, we show how temperature-induced changes in the refractive index of the PMMA-DCM layer result in a blue shift of this single lasing mode. We demonstrate spectral tunability over an 8nm-wide bandwidth.
我们展示了基于掺杂4-二氰基亚甲基-2-甲基-6-（对二甲氨基苯乙烯基）-4H-吡喃（DCM）的聚甲基丙烯酸甲酯（PMMA）染料的固态随机激光器中部分泵浦单波长随机激光器的温度控制光谱可调性。通过精心塑造泵浦光的空间分布，我们首先实现了具有出色旁瓣抑制的低阈值单模随机激光发射。值得注意的是，我们展示了PMMA-DCM层折射率的温度诱导变化如何导致该单激光模式的蓝移。我们展示了在8nm宽的带宽上的光谱可调性。
