Mechanically tunable optofluidic distributed feedback dye laser
Mechanically tunable optofluidic distributed feedback dye laser
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DOI：
10.1364/oe.14.010494
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发表时间：
2006-10-30
期刊：
影响因子：
3.8
通讯作者：
Psaltis, Demetri
中科院分区：
文献类型：
--
作者：
Li, Zhenyu;Zhang, Zhaoyu;Psaltis, Demetri
在聚二甲基硅氧烷（PDMS）单片复制模芯片上实现了连续可调谐的分布反馈（DFB）染料激光器。光反馈是由一个相移高阶布拉格光栅嵌入在单模埋沟波导的液芯。由于PDMS的软弹性体性质，可以通过机械拉伸光栅周期来调谐激光频率。原则上，机械调谐范围仅受增益带宽限制。通过将两种常见的染料分子罗丹明6G和罗丹明101组合在一起，从单个染料激光器芯片上实现了近60nm的调谐范围。单模工作，线宽小于0.1nm。由于高阶光栅，当用不同的染料溶液操作时，单个激光器可以提供覆盖从近UV到近IR的整个光谱的可调谐光输出，其中有效的激光染料是可用的。在一个芯片上还演示了具有不同光栅周期的五个DFB染料激光器的阵列。这种可调谐集成激光器阵列有望成为廉价先进光谱芯片的关键部件。(c)2006年美国光学学会。
A continuously tunable optofluidic distributed feedback (DFB) dye laser was demonstrated on a monolithic replica molded poly( dimethylsiloxane) ( PDMS) chip. The optical feedback was provided by a phase-shifted higher order Bragg grating embedded in the liquid core of a single mode buried channel waveguide. Due to the soft elastomeric nature of PDMS, the laser frequency could be tuned by mechanically stretching the grating period. In principle, the mechanical tuning range is only limited by the gain bandwidth. A tuning range of nearly 60nm was demonstrated from a single dye laser chip by combining two common dye molecules Rhodamine 6G and Rhodamine 101. Single-mode operation was maintained with less than 0.1nm linewidth. Because of the higher order grating, a single laser, when operated with different dye solutions, can provide tunable light output covering the entire spectrum from near UV to near IR in which efficient laser dyes are available. An array of five DFB dye lasers with different grating periods was also demonstrated on a chip. Such tunable integrated laser arrays are expected to become key components in inexpensive advanced spectroscopy chips. (c) 2006 Optical Society of America.