光学反波导中的无衍射啁啾贝塞尔波
Non-diffracting chirped Bessel waves in optical antiguides
AI总结:
本文提出光学反波导中近轴波动方程的无衍射啁啾贝塞尔波解,并通过数值模拟证明其有限能量形式可抵抗散焦、弯曲和偏心发射影响,且具有自愈能力。
摘要:
啁啾贝塞尔波被提出作为折射率具有幂律径向变化的光学反波导中近轴波动方程的稳定(无衍射)解。通过数值模拟,我们研究了此类波的切趾(有限能量)版本(带有或不带有涡旋)在具有实际参数的反波导中的传播。这些新波对不稳定折射率势的散焦效应表现出显著的抵抗力,优于具有相同半高全宽的标准高斯光束。即使在偏心发射或反波导弯曲的条件下,啁啾分布仍能保持,并且还能像自由空间中的标准无衍射光束一样进行自愈。
英文摘要:
Chirped Bessel waves are introduced as stable (non-diffracting) solutions of the paraxial wave equation in optical antiguides with a power-law radial variation in their index of refraction. Through numerical simulations, we investigate the propagation of apodized (finite-energy) versions of such waves, with or without vorticity, in antiguides with practical parameters. The new waves exhibit a remarkable resistance against the defocusing effect of the unstable index potentials, outperforming standard Gaussians with the same full width at half maximum. The chirped profile persists even under conditions of eccentric launching or antiguide bending and is also capable of self-healing like standard diffraction-free beams in free space.
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