223rd RQC Seminar

• 講演者

  Ms. Zou YuHong
  ( Nanjing University, College of Engineering and Applied Sciences )

• 日程

  2025年9月2日(火), 16:00 - 17:00 (4:00 p.m. - 5:00 p.m.)

• 開催場所

  ハイブリッド（ZOOM・ Room 345-347 Seminar Room at Wako Main Research Bldg. 3F / 研究本館3階 セミナー室 (345-347) (C01))

• 講演タイトル

  Broadband Optical Nonreciprocity Based on Gain Saturation

• お問合せ

  norilab_rqc_assist[at]ml.riken.jp

講演概要
Nonreciprocal optical devices, allowing transmission of light with different efficiencies in opposite directions, are key elements for modern optical communication and even quantum information technologies, but elusive to be integrated on a chip to date. Such devices exploring nonlinearity can tackle this integration issue without using a magnetic field. However, they are constrained by narrow bandwidth or large signal power, because of the weak nonlinear strength of materials. Here, by combining the strong gain-saturation nonlinearity of an Er-doped optical fiber and the asymmetric inputs, we experimentally demonstrate a broadband resonator-free nonreciprocal optical device. This simple design paves the way for integrated broadband nonreciprocity devices and can boost the functions of photonic chips.