内容简介
《光子晶体光纤——特性及应用(影印版)》试图对光子晶体光纤作专业的导读,是在通信方面。本书深刻地分析了光子晶体光纤的物理与几何特性,并说明这些特性是如何导致了这种新型光纤的特殊表现。本书主要应用了有限元方法这一有力工具。并且,本书还关注了光子晶体光纤制造技术的极限和可能性。本书将对通信领域及其他光纤技术应用的领域的研究者提供帮助,也可作为这些领域的研究生的参考读物。
目录
Preface
Acknowledgements
Introduction
1 Basics of photonic crystal fibers
1.1 From conventional optical fibers to PCFs
1.2 Guiding mechanism
1.2.1 Modified total internal reflection
1.2.2 Photonic bandgap guidance
1.3 Properties and applications
1.3.1 Solid-core fibers
1.3.2 Hollow-core fibers
1.4 Loss mechanisms
1.4.1 Intrinsic loss
1.4.2 Confinement loss
1.4.3 Bending loss
1.5 Fabrication process
1.5.1 Stack-and-draw technique
1.5.2 Extrusion fabrication process
1.5.3 Microstructured polymer optical fibers
1.5.4 OmniGuide fibers
1.6 Photonic crystal fibers in the market
Bibliography
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摘要与插图
1.3.1 Solid-core fibersIndex-guiding PCFs, with a solid glass region within a lattice of air-holes, offer a lot of new opportunities, not only for applications related to fundamental fiber optics. These opportunities are related to some special properties of the photonic crystal cladding, which are due to the large refractive index contrast and the two-dimensional nature of the microstructure, thus affecting the birefringence, the dispersion, the smallest attainable core size, the number of guided modes and the numerical aperture and the birefringence. Highly birefringent fibers Birefringent fibers, where the two orthogonally polarized modes carried in a single-mode fiber propagate at different rates, are used to maintain polarization states in optical devices and subsystems. The guided modes become birefringent if the core microstructure is deliberately made twofold symmetric, for example, by introducing capillaries with different wall thicknesses above and below the core. By slightly changing the air-hole geometry, it is possible to produce levels of birefringence that exceed the performance of conventional birefringent fiber by an order of magnitude. It is important to underline that, unlike traditional polarization maintaining fibers, such as bow tie, elliptical-core or Panda, which contain at least two different glasses, each one with a different thermal expansion coefficient, the birefringence obtainable with PCFs is highly insensitive to temperature, which is an important feature in many applications. An example of the cross-section of a highly birefringent PCF is reported in Fig. 1.6.
Dispersion tailoring
The tendency for different light wavelengths to travel at