The present work deals with a curvature sensor that consists of two segments of asymmetric multicore fiber (MCF) fusion spliced with standard single mode fiber (SMF). The MCF comprises three strongly coupled cores; one of such cores is at the geometrical center of the MCF. The two segments of MCF are short, have different lengths (less than 2 cm each), and are rotated 180 degrees with respect to each other. The fabrication of the sensor was carried out with a fusion splicing machine that has the means for rotating optical fibers. It is demonstrated that the sensor behaves as two SMF-MCF-SMF structures in series, and consequently, it has enhanced sensitivity. The device proposed here can be used to sense the direction and amplitude of curvature by monitoring either wavelength shifts or intensity changes. In the latter case, high curvature sensitivity was observed. The device can also be used for the development of other highly sensitive sensors to monitor, for example, vibrations, force, pressure, or any other parameter that induces periodic or local curvature or bending to the MCF segments.
Fiber Link Stabilization with a Multicore Fiber Amplifier
University of Colorado Boulder（科罗拉多大学博尔德分校）；National Institute of Standards and Technology（美国国家标准与技术研究院）；KDDI Research, Inc.（KDDI研究所）；Sumitomo Electric Industries, Ltd.（住友电气工业株式会社）；Nokia Bell Labs（诺基亚贝尔实验室）
Enabling a multifunctional telecommunications fiber optic network: Ultrastable optical frequency transfer and attosecond timing in deployed multicore fiber
Novosibirsk State University（新西伯利亚国立大学）；Federal Research Center for Information and Computational Technologies（信息与计算技术联邦研究中心）；School of Physics and Engineering, ITMO University（ITMO大学物理与工程学院）
Telecom Compatibility Validation of Quantum Key Distribution Co-existing with 112 Gbps/λ/core Data Transmission in Non-Trench and Trench-Assistant Multicore Fibers
Sub-femtosecond stabilization of multicore fiber for high-fidelity quantum networking at 100% duty cycle
National Institute of Standards and Technology（美国国家标准与技术研究院）；University of Colorado Boulder（科罗拉多大学博尔德分校）；Nokia Bell Labs（诺基亚贝尔实验室）；Sumitomo Electric Industries, Ltd.（住友电气工业株式会社）；University of Colorado, Boulder（科罗拉多大学博尔德分校）
Sub-picosecond inter-core skew characterization in multicore fibers via Hong--Ou--Mandel interference
Universidad de Concepción（康塞普西翁大学）；ANID – Millennium Science Initiative Program – Millennium Institute for Research in Optics, Universidad de Concepción（智利国家研究署-千年科学倡议计划-康塞普西翁大学光学研究千年研究所）；Universidade Federal de Santa Catarina（圣卡塔琳娜联邦大学）；ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology（ICFO-光子科学研究所，巴塞罗那科学技术研究所）；Luxquanta Technologies S.L.（Luxquanta科技有限公司）；Sapienza Università di Roma（罗马大学）；Universidad Católica de la Santísima Concepción（圣母无原罪天主教大学）
Mode-tunable inter-core coupling of photon-number-resolved quantum light in a telecom multicore fiber
Department of Physics, University at Buffalo, The State University of New York（纽约州立大学布法罗分校物理系）；Science and Technology Division, Corning Research and Development Corporation（康宁研发公司科学与技术部）
Lensless multicore-fiber microendoscope for real-time tailored light field generation with phase encoder neural network (CoreNet)
Laboratory of Measurement and Sensor System Technique, TU Dresden（德累斯顿工业大学测量与传感器系统技术实验室）；Competence Center for Biomedical Computational Laser Systems (BIOLAS), TU Dresden（德累斯顿工业大学生物医学计算激光系统能力中心）；State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University（清华大学精密仪器系精密测量技术与仪器国家重点实验室）；Cluster of Excellence Physics of Life, TU Dresden（德累斯顿工业大学生命物理学卓越集群）；Institute of Applied Physics, TU Dresden（德累斯顿工业大学应用物理研究所）
