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Papers and Research

Journal papers, conference papers, and technical reports.

62 items PicksRelated topicsTechnology AdvancesPhysical Optics

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Items 61–62 of 62
Jun 23Mon
  1. Hangzhou Institute of Optics and Fine Mechanics · Recent HighlightsOptics industry59

    Russell Center and Partners Report in Optica: Hollow-Core Photonic Crystal Fiber Enables Flexible Delivery of Near-Watt, Hundred-Femtosecond 2.8 µm Mid-Infrared Pulses

    The Russell Advanced Lightwave Science Center at the Hangzhou Institute of Optics and Mechanics, together with the Hangzhou Institute for Advanced Study of UCAS, the Shanghai Institute of Optics and Mechanics, and IRFIBER (Ningbo) Optoelectronics Co., Ltd., published a paper in Optica on delivering near-watt, hundred-femtosecond mid-infrared pulses in the 2.8 µm band through a 5 m-long hollow-core photonic crystal fiber with a single-core, eight-ring structure. After evacuation, overall efficiency exceeded 70%, the output was a near-diffraction-limited Gaussian spot, and the fundamental-mode energy fraction exceeded 95%.

    Why we recommend it: The paper gives efficiency, pulse duration, peak power and fundamental-mode fraction, and compares the fiber with free-space optics and solid-core fluoride fiber, making it easier to judge the applicability of hollow-core fiber to mid-infrared ultrafast delivery.

Jul 10Wed
  1. Guangdian Hui · BriefsOptics industry60

    Progress in Passively Mode-Locked Laser Technology with Ring Cavities at Suzhou Institute of Nano-Tech

    A team at the Suzhou Institute of Nano-Tech, Chinese Academy of Sciences, has developed a theoretical model for PML-SRLs, revealing that operating states are governed by the temporal balance of gain and loss. The model combines time-domain traveling-wave equations with partial differential equations for carrier density, examining the relationship among SOA carrier accumulation rate, SA carrier lifetime and ring-cavity round-trip time. The work, published in Optics Express, also found that an SOA with a narrow gain spectrum and a short resonator configuration can merge output pulses to yield high-energy optical pulses.

    Why we recommend it: Putting gain, absorber and cavity round-trip time into a unified dynamic model offers transferable design insight for understanding mode-locking states and pulse merging in semiconductor ring cavities.