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arXiv physics/0411211physics.opticsphysics.flu-dyn
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耦合腔微荧光染料环Laser

A Coupled Cavity Micro Fluidic Dye Ring Laser

M. Gersborg-Hansen, S. Balslev, N. A. Mortensen, A. Kristensen

摘要:

我们提出了一个横向发射,耦合腔微流体染料环激光器,适合集成到芯片实验室微系统。微流控激光器已成功地设计,制造,表征和建模。谐振腔由两个等腰三角形反射镜包围的微流体通道形成。微流体激光器结构是使用光刻法在玻璃基板上的10微米厚的SU-8聚合物中限定的。微流体通道由玻璃盖密封,使用PMMA粘合剂粘合。激光器的特点是使用激光染料罗丹明6 G溶解在乙醇或乙二醇作为主动增益介质,这是通过微流体通道和激光谐振腔泵浦。染料激光器由脉冲倍频Nd:YAG激光器在532 nm处垂直于芯片平面光泵浦,并且观察到具有约55微焦耳/平方毫米的阈值泵浦脉冲能量通量的激光发射。激光是多模的,并且激光器具有耦合到集成聚合物平面波导中的可切换输出。通过改变染料/溶剂性质来调谐激光波长是可行的。

英文摘要:

We present a laterally emitting, coupled cavity micro fluidic dye ring laser, suitable for integration into lab-on-a-chip micro systems. The micro-fluidic laser has been successfully designed, fabricated, characterized and modelled. The resonator is formed by a micro-fluidic channel bounded by two isosceles triangle mirrors. The micro-fluidic laser structure is defined using photo lithography in 10 microns thick SU-8 polymer on a glass substrate. The micro fluidic channel is sealed by a glass lid, using PMMA adhesive bonding. The laser is characterized using the laser dye Rhodamine 6G dissolved in ethanol or ethylene glycol as the active gain medium, which is pumped through the micro-fluidic channel and laser resonator. The dye laser is optically pumped normal to the chip plane at 532 nm by a pulsed, frequency doubled Nd:YAG laser and lasing is observed with a threshold pump pulse energy flux of around 55 micro-Joule/square-milimeter. The lasing is multi-mode, and the laser has switchable output coupling into an integrated polymer planar waveguide. Tuning of the lasing wavelength is feasible by changing the dye/solvent properties.

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