Chandrahalim Hengky, Chen Qiushu, Said Ali A, Dugan Mark, Fan Xudong
Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
Lab Chip. 2015 May 21;15(10):2335-40. doi: 10.1039/c5lc00254k.
We designed, fabricated, and characterized a monolithically integrated optofluidic ring resonator laser that is mechanically, thermally, and chemically robust. The entire device, including the ring resonator channel and sample delivery microfluidics, was created in a block of fused-silica glass using a 3-dimensional femtosecond laser writing process. The gain medium, composed of Rhodamine 6G (R6G) dissolved in quinoline, was flowed through the ring resonator. Lasing was achieved at a pump threshold of approximately 15 μJ mm(-2). Detailed analysis shows that the Q-factor of the optofluidic ring resonator is 3.3 × 10(4), which is limited by both solvent absorption and scattering loss. In particular, a Q-factor resulting from the scattering loss can be as high as 4.2 × 10(4), suggesting the feasibility of using a femtosecond laser to create high quality optical cavities.
我们设计、制造并表征了一种单片集成的光流体环形谐振腔激光器，该激光器在机械、热和化学方面都具有很强的稳定性。整个器件，包括环形谐振腔通道和样品输送微流体，是使用三维飞秒激光写入工艺在一块熔融石英玻璃中制作而成的。由溶解在喹啉中的罗丹明6G（R6G）组成的增益介质流经环形谐振腔。在约15 μJ mm(-2)的泵浦阈值下实现了激光发射。详细分析表明，光流体环形谐振腔的品质因数为3.3×10(4)，这受到溶剂吸收和散射损耗的限制。特别是，由散射损耗导致的品质因数可高达4.2×10(4)，这表明使用飞秒激光创建高质量光学腔的可行性。
