Optical research, technology transfer and the optoelectronic industry ecosystem of the Hangzhou Institute of Optics, a local new-type R&D institution in Hangzhou.
Xinkong Guanglian's hollow-core fiber has a loss of about 0.043 dB/km at 1550 nm, with fiber adapter insertion loss as low as 0.5 dB, marking its entry into commercialization.
Why we recommend it: The original article provides specific data and details that help assess actual progress in this direction
The Ruosi Advanced Optical Wave Science Center of the Hangzhou Institute of Optics and Mechanics, together with the Hangzhou Institute for Advanced Study of UCAS, the Shanghai Institute of Optics and Fine Mechanics, and IRFIBER (Ningbo) Optoelectronic Technology Co., Ltd., published a paper in Optica describing the delivery of near-watt, hundred-femtosecond mid-infrared pulses at 2.8 μm through a 5 m-long hollow-core photonic crystal fiber with a single-core, eight-ring structure. After evacuation, the overall efficiency exceeded 70%, with a near-diffraction-limited Gaussian output spot and a fundamental-mode energy fraction above 95%.
Why we recommend it: The paper provides efficiency, pulse duration, peak power and fundamental-mode fraction, and compares with free-space optics and solid-core fluoride fibers, making it easy to assess the applicability of hollow-core fiber for mid-infrared ultrafast delivery.