题目： Towards a perfect hollow-core fiber

报告人：汪滢莹 副研究员

主持人：金龙 研究员

时间：2018年6月14日（周四）10:00-11:00

地点：曾宪梓科学馆405会议室

报告摘要：

The invention of optical fiber in the 20^th century has not only revolutionized the way people communicate but also brought about significant changes in optical sensing, laser and many emerging research fields. However, in the 21^st century, with the dramatic increase of the global internet traffic, there’s a general fear of a possible “capacity crunch” in the near future, which is grounded in the intrinsic material imperfection of silica optical fiber, i.e. Rayleigh scattering loss (RSL), chromatic dispersion, and Kerr nonlinearity. In other research fields, the pursuit for higher laser power, higher sensitivity of specific physical quantities and many new requirements in biophotonics, quantum optics, etc. also calls for a revolution in the optical fiber itself. Hollow-core fiber (HCF), allowing light to travel in a quasi-vacuum optical environment with unique merits of low nonlinearity, low dispersion, low latency and potentially low loss, points out a promising avenue for solving the upcoming key problems in these areas. The investigation on the ultimate limit of HCF has become a hot research topic with intense attention worldwide. In this talk, we review our recent progress towards a “perfect hollow core fiber”, including our unique understanding of the guidance mechanism of anti-resonant type HCF, the novel design and fabrication of several HCF structures, and several applications in lasers, sensing and potentially optical communications. In particular, our newly fabricated conjoined-tube HCF exhibits an ultralow loss of 2 dB/km at 1512 nm and a < 16 dB/km bandwidth of 335 nm, beating all of the existing types of HCF. It could be a potential rival to the silica optical fiber in the future for solving the communication “capacity crunch” issue.

报告人简介：

汪滢莹，北京工业大学激光工程研究院副研究员，2012年入选北京市“海聚工程”青年学者，2018年入选北京市科技新星计划。2011年毕业于英国巴斯大学，获博士学位。博士论文被评为2011-2012年度巴斯大学物理系最佳博士论文。 2010.11至2012.4分别在英国巴斯大学、法国利摩日大学从事博士后工作。2012.8回国加入北京工业大学，主要研究领域为光子晶体光纤、非线性光纤光学等。近期在空芯反谐振光纤领域取得多项国际领先的研究成果，在多个国际会议上做邀请报告，在Physic Review Letters、Optics Letters、Optics Express等SCI杂志上发表文章20多篇。现主持国家自然科学基金面上项目两项。

欢迎广大师生踊跃参加！

光子技术研究院

2018年6月6日