Guiding 2.94 $ μ$m using low-loss microstructured antiresonant triangular-core fibers

Empirical formulae for hollow-core antiresonant fibers: dispersion and effective mode area

We present empirical formulae that can provide dispersion and average effective area of the fundamental mode in hollow-core antiresonant fibers. The formulae draw on the structural parameters of the fiber, and allow one to obtain the guiding properties over a wide spectral bandwidth, without the need for time consuming numerical simulations. The formulae are validated by comparing their results with those obtained using a finite-element method. We also analyze the effects of changing the number of antiresonant tubes, as well as adding nested elements in the antiresonant tubes on the guiding pr…

Optimisation of microstructured waveguides in z-cut LiNbO3 crystals

We present a practical approach to the numerical optimisation of the guiding properties of buried microstructured waveguides, which can be fabricated in a z-cut lithium niobate (LiNbO3) crystal by the method of direct femtosecond laser inscription. We demonstrate the possibility to extend the spectral range of low-loss operation of the waveguide into the mid-infrared region beyond 3μm.

Designing microstructured polymer optical fibers for cascaded quadratic soliton compression of femtosecond pulses

The dispersion of index-guiding microstructured polymer optical fibers is calculated for second-harmonic generation. The quadratic nonlinearity is assumed to come from poling of the polymer, which in this study is chosen to be the cyclic olefin copolymer Topas. We found a very large phase mismatch between the pump and the second-harmonic waves. Therefore the potential for cascaded quadratic second-harmonic generation is investigated in particular for soliton compression of fs pulses. We found that excitation of temporal solitons from cascaded quadratic nonlinearities requires an effective quad…

空芯光纤中的光孤子

Optical Solitons in Hollow-Core Fibres

本文回顾了充气空芯光纤中光孤子动力学的研究，涵盖不同光纤结构对孤子传输、自压缩、自频移和色散波发射的影响，展示了从兆瓦到太瓦功率、亚飞秒脉宽及跨紫外到近红外的可调谐脉冲产生。

Tailoring modal properties of inhibited-coupling guiding fibers by cladding modification

Understanding cladding properties is crucial for designing microstructured optical fibers. This is particularly acute for Inhibited-Coupling guiding fibers because of the reliance of their core guidance on the core and cladding mode-field overlap integral. Consequently, careful planning of the fiber cladding parameters allows obtaining fibers with optimized characteristics such as low loss and broad transmission bandwidth. In this manuscript, we report on how one can tailor the modal properties of hollow-core photonic crystal fibers by adequately modifying the fiber cladding. We show that the …

隧道尽头的新曙光：光纤气体放电激光器

A new light at the end of the tunnel: fiber gas discharge lasers

针对固态光纤激光器波长受限的问题，研究人员采用充氙的反谐振导波空芯光纤，通过氦-氙余辉放电泵浦实现3500 nm激光输出，验证了激光作用，为多波长柔性光纤激光器开辟了新方向。