Kieu K, Schneebeli L, Norwood R A, Peyghambarian N
College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA.
Opt Express. 2012 Mar 26;20(7):8148-54. doi: 10.1364/OE.20.008148.
We have developed a novel integrated platform for liquid photonics based on liquid core optical fiber (LCOF). The platform is created by fusion splicing liquid core optical fiber to standard single-mode optical fiber making it fully integrated and practical - a major challenge that has greatly hindered progress in liquid-photonic applications. As an example, we report here the realization of ultralow threshold Raman generation using an integrated CS₂ filled LCOF pumped with sub-nanosecond pulses at 532 nm and 1064 nm. The measured energy threshold for the Stokes generation is 1nJ, about three orders of magnitude lower than previously reported values in the literature for hydrogen gas, a popular Raman medium. The integrated LCOF platform opens up new possibilities for ultralow power nonlinear optics such as efficient white light generation for displays, mid-IR generation, slow light generation, parametric amplification, all-optical switching and wavelength conversion using liquids that have orders of magnitude larger optical nonlinearities compared with silica glass.
我们基于液芯光纤（LCOF）开发了一种新型的液体光子学集成平台。该平台通过将液芯光纤熔接到标准单模光纤上而创建，使其完全集成且实用——这是一个极大阻碍液体光子应用进展的重大挑战。例如，我们在此报告使用集成的填充CS₂的LCOF实现了超低阈值拉曼产生，该LCOF由532 nm和1064 nm的亚纳秒脉冲泵浦。测量得到的斯托克斯产生的能量阈值为1 nJ，比文献中先前报道的氢气（一种常见的拉曼介质）的值低约三个数量级。集成的LCOF平台为超低功率非线性光学开辟了新的可能性，例如用于显示器的高效白光产生、中红外产生、慢光产生、参量放大、全光开关以及使用与石英玻璃相比具有大几个数量级光学非线性的液体进行波长转换。
