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Single mode operation and ultrawide tuning of on-chip optofluidic dye lasers.
Lab on a Chip ( IF 6.1 ) Pub Date : 2020-08-31 , DOI: 10.1039/d0lc00742k Lin Chen 1 , Chenming Zhao 1 , Liying Liu 1 , Lei Xu 2
Lab on a Chip ( IF 6.1 ) Pub Date : 2020-08-31 , DOI: 10.1039/d0lc00742k Lin Chen 1 , Chenming Zhao 1 , Liying Liu 1 , Lei Xu 2
Affiliation
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Single transverse mode lasers that can be continuously tuned over ultrawide wavelength ranges with a narrow linewidth are very important components for lab-on-a-chip systems. Such lasers that can be tuned over the whole visible spectrum or even beyond have not been demonstrated hitherto regardless of many years of research in this area. This article presents an on-chip optofluidic distributed Bragg reflector (DBR) dye laser constituted by a combination of a T-shaped optofluidic waveguide (T waveguide) and two ridge-waveguide-based fluidic DBR gratings, in which the T waveguide provides gain for lasing and the DBR gratings select the lasing wavelength. This configuration guarantees that the fundamental mode has a much lower loss (consequently much lower lasing threshold) than all the higher order modes. By fabricating PDMS devices of such structure and changing the fluid in DBR gratings as well as the gain fluid in the T waveguide, we demonstrate a single mode optofluidic dye laser that can be continuously tuned over a wavelength range of more than 450 nm with a linewidth less than 0.1 nm. Mode patterns obtained when using different laser dyes in the T waveguide verify fundamental mode operation over the wide wavelength range.
中文翻译：
单模操作和片上光流体染料激光器的超宽调谐。
可以在超宽波长范围内以窄线宽连续调谐的单横模激光器对于芯片实验室系统来说是非常重要的组件。迄今为止，无论在该领域进行了多年的研究，都尚未展示出可以在整个可见光谱范围甚至更大范围内调谐的此类激光器。本文介绍了一种片上光流体分布式布拉格反射器（DBR）染料激光器，该激光器由T形光流体波导（T波导）和两个基于脊波导管的流体DBR光栅的组合构成，其中T波导为激光和DBR光栅选择激光波长。这种配置保证了基本模式的损耗要比所有高阶模式的损耗低得多（因此，激射阈值要低得多）。通过制造这种结构的PDMS器件并改变DBR光栅中的流体以及T波导中的增益流体，我们演示了一种单模光流体染料激光器，该激光器可以在线宽超过450 nm的波长范围内连续调谐小于0.1 nm。在T波导中使用不同的激光染料时获得的模式模式可验证在宽波长范围内的基本模式操作。
更新日期：2020-10-13
中文翻译：
单模操作和片上光流体染料激光器的超宽调谐。
可以在超宽波长范围内以窄线宽连续调谐的单横模激光器对于芯片实验室系统来说是非常重要的组件。迄今为止，无论在该领域进行了多年的研究，都尚未展示出可以在整个可见光谱范围甚至更大范围内调谐的此类激光器。本文介绍了一种片上光流体分布式布拉格反射器（DBR）染料激光器，该激光器由T形光流体波导（T波导）和两个基于脊波导管的流体DBR光栅的组合构成，其中T波导为激光和DBR光栅选择激光波长。这种配置保证了基本模式的损耗要比所有高阶模式的损耗低得多（因此，激射阈值要低得多）。通过制造这种结构的PDMS器件并改变DBR光栅中的流体以及T波导中的增益流体，我们演示了一种单模光流体染料激光器，该激光器可以在线宽超过450 nm的波长范围内连续调谐小于0.1 nm。在T波导中使用不同的激光染料时获得的模式模式可验证在宽波长范围内的基本模式操作。
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