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Coherent light transmission properties of commercial photonic crystal hollow core optical fiber

机译：商业光子晶体空心光纤的相干光传输特性

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摘要

Photonic crystal hollow core fiber (PC-HCF) has enabled many exciting new applications in nonlinear optics and spectroscopy. However, to date there has been less impact in coherent applications where preservation of optical phase over long fiber lengths is crucial. This paper presents characteristics of three commercially available PC-HCFs relevant to coherent applications including higher-order mode analysis, birefringence and polarization-dependent loss, and their impact on coherent light transmission in PC-HCF. Multipath interference due to higher-order mode propagation and Fresnel reflection is shown to generate excess intensity noise in transmission, which can be suppressed by up to 20 dB through high frequency phase modulation of the source laser. To demonstrate the potential of PC-HCF in high performance sensing, a Mach-Zehnder interferometer (MZI) incorporating 10 m of PC-HCF in each arm is characterized and demonstrates a phase resolution (59 x 10(-9) rad/Hz(1/2) at 30 kHz) close to the shot noise limit, which is better than can be achieved in a MZI made with the same length of single mode solid core fiber because of the limit set by fundamental thermodynamic noise (74 x 10(-9) rad/Hz(1/2) at 30 kHz). (C) 2015 Optical Society of America
机译：光子晶体空心光纤（PC-HCF）在非线性光学和光谱学中实现了许多令人兴奋的新应用。然而，迄今为止，在相干应用中影响较小，在相干应用中，在较长的光纤长度上保持光学相位至关重要。本文介绍了与相干应用相关的三种商用PC-HCF的特性，包括高阶模式分析，双折射和偏振相关损耗，以及它们对PC-HCF中相干光传输的影响。高阶模传播和菲涅耳反射引起的多径干扰显示会在传输中产生过量的强度噪声，通过源激光器的高频相位调制可以将其抑制高达20 dB。为了证明PC-HCF在高性能感测中的潜力，对每个臂中均装有10 m PC-HCF的Mach-Zehnder干涉仪（MZI）进行了表征，并演示了相位分辨率（59 x 10（-9）rad / Hz（ 1/2）在30 kHz时）接近散粒噪声极限，由于基本热力学噪声（74 x 10（ -9）rad / Hz（1/2）at 30 kHz）。 （C）2015年美国眼镜学会

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