光子晶体光纤的应用和进展

光子晶体光纤(PCF)和普通光纤相比，具有宽带单模特性、超大数值孔径、独特的色散性和超连续光谱等特性。介绍了PCF的原理，讨论了PCF的各个特性以及相应的应用和研究进展。     

光子晶体光纤的新进展及其应用

光子晶体光纤(PCF)由于具有传统光纤无法比拟的奇异特性，吸引了学术界和产业界的广泛关注，在短短的十年内PCF的研究取得了很大的进展。阐述了PCF的一些独特光学性质、制作技术及其理论研究方法，介绍了PCF的最新成果，并展望了其学术研究和应用前景。     

PCF的制造、特性和传输试验

光子晶体光纤（PCF）具有独特的几何结构和传输特性，使其在发明之后就快速进入各种光信号传输试验，为此综述了PCF的制造、导光原理、特性及其在光纤通信方面的试验。     

光子晶体光纤及其激光器

光子晶体光纤(PCF)与普通光纤相比有着优秀的单模特性、色散特性和非线性特性。简述了光子晶体光纤的基本结构及其优点,并分析了利用光子晶体光纤制作光子晶体光纤激光器及大功率光纤激光器方面的研究进展。     

光子晶体光纤及其在光通信中的应用

简述了三类光子晶体光纤(PCF：photonic crystal fibers)的结构、导光机制及特性，介绍了PCF的研究现状和在光通信中的应用，探计了PCF的应用前景。     

光子晶体光纤的研究新进展

国际上关于光子晶体光纤(PCF)的研究主要集中在改善PCF的性能和拓展PCF的应用领域两方面.文章介绍了光子晶体光纤的结构、导光原理和主要特性,并重点讨论了高性能光子晶体光纤的研制情况以及光子晶体光纤的在应用领域的新进展.     

有中心缺陷孔的矩形点阵PCF双折射特性研究

采用全矢量有限元法研究了具有中心椭圆缺陷孔的矩形点阵PCF(光子晶体光纤)的双折射特性。结果发现,该新型PCF的双折射特性对波长和光纤的结构参数具有较强的依赖关系,与无中心椭圆缺陷孔的矩形点阵PCF相比,在中心缺陷孔参数bc/Λ=0.075、中心空气孔椭圆率η=2.2、包层结构参数Λ=2.0μm和d/Λ=0.48时,该新型PCF具有更高的双折射。     

低折射率芯PCF基模损耗的数值模拟与分析

应用多极法理论计算了低折射率芯光子晶体光纤（PCF）基模的损耗并与未掺杂芯PCF进行了比较，发现可以从损耗的角度来理解低折射率芯PCF的截止特性：传输波长靠近短波长时，模式的损耗会突然变大，从而导致基模截止；而处于长波长时，这种光纤的传输特性和普通PCF相类似。通过改变纤芯折射率的大小和包层中空气孔的大小，可以对光纤的截止波长进行调节。     

双包层光子晶体光纤激光器研究进展

光子晶体光纤(PCF)具有许多传统光纤难以实现的诸多优良特性,以光子晶体光纤为增益介质的高功率光纤激光器受到了普遍关注.介绍了光子晶体光纤及由其构成的光子晶体激光器的原理,重点介绍了双包层光子晶体光纤激光器国内外的最新研究进展.     

光子晶体光纤及其在传感器中的应用

光子晶体光纤(PCF)是一种新型光纤,其结构和导光机理都与普通光纤不同,呈现出许多在传统光纤中难以实现的特性,并因此受到广泛关注.PCF具有的特殊的性质扩大了光纤的应用领域.利用PCF的某些特性,可以制作性能优良的传感器.文章首先介绍了PCF的基本概念和主要特性,然后介绍了PCF在传感方面的几种应用.     

Extending transmission bandwidth of air-core photonic bandgap fibers

Air-core photonic bandgap fibers offer many unique properties and are critical to many emerging applications. A notable property is the high nonlinear threshold which provides a foundation for applications at high peak powers. The strong interaction of light and air is also essential for a number of emerging applications, especially those based on nonlinear interactions and spectroscopy. For many of those applications, much wider transmission bandwidths are desired to accommodate a wider tuning range or the large number of optical wavelengths involved. Presently, air-core photonic bandgap fibers have a cladding of hexagonal lattice. The densely packed geometry of hexagonal stacking does not allow large nodes in the cladding, which would provide a further increase of photonic bandgaps. On the other hand, a photonic cladding with a square lattice can potentially provide much larger nodes and consequently wider bandgap. In this work, the potentials of much wider bandgap with square lattice cladding is theoretically studied and experimentally demonstrated.     

密集波分多路技术最新实验评析

本文首先指出光纤通信系统研究的主攻方向。而后说明密集波分多路的实验系统和介绍最新报道的１Ｔｂ／ｓ系统。本文讲到密集波分多路系统使用的单模光纤，包括常规的、色散移位的、色散补偿的和非零色散等几种光纤。然后说明密集波分多路系统使用的光纤放大器及其改善增益频谱的方法，又讲到在波分多路方式以外，光的时分多路和偏振多路方式。最后指出密集波分多路系统的实际应用有赖于光子集成技术的进步。     

光子晶体光纤数字建模及理论研究初探

本文介绍了光子晶体光纤的分类.针对全反射型光子晶体光纤,给出了几种建立数值模型的方法并对相应的的数理推导做了概要的介绍,最后对这几种理论研究的优势和缺点进行了比较.     

光子晶体光纤的原理及其应用的研究

光子晶体光纤具有与传统光纤完全不同的几何结构、导光机制、模式特性、色散以及双折射性质。本文简述了光子晶体光纤的一些重要特性及其应用。     

Optimized butt coupling between single mode fiber and hollow-core photonic crystal fiber

In this paper, the optimum gap for maximum light coupling between Single Mode Fiber (SMF) & Hollow Core Photonic Crystal Fiber (HC-PCF) is theoretically computed and experimentally demonstrated. The Gaussian beam profile emanating from transmitting fiber undergoes Fresnel diffraction in the air up to some distance till its diffracted Mode Field Diameter (MFD) matches with the core diameter of receiving fiber. Theoretically computed such distance provides an optimum gap for maximum light coupling between these two fibers. The optimum gap is numerically computed as 7.618 μm and 12.598 μm for SMF to HC-PCF and HC-PCF to SMF light transmission configurations respectively and is verified experimentally. This optimized gap is useful for HC-PCF based devices to be joined to SMF as a transmission medium.     

Analysis on photonic crystal fibers with circular air holes in elliptical configuration

In this paper, two novel structures of photonic crystal fibers (PCFs) containing elliptical rings of circular air holes are presented. The circular air holes in both structures are arranged in seven elliptical rings, but the number of holes in each ring is different for these structures. Moreover, air hole diameter and hole-to-hole pitch are altered along the distance from the center of the fiber’s cross section. Properties, such as birefringence and confinement loss, of these structures with different numbers of air hole rings are numerically analyzed by using the multipole method. Numerical results show that a high birefringence of 1.626 × 10⁻³ can be reached at the wavelength of 1.55 μm, and a low confinement loss on the order of 10⁻⁸ dB/m can be achieved at the same wavelength. Furthermore, it is also found that elliptic ratio obviously affects birefringence and confinement loss, but the number of air hole rings has little impact on birefringence.     

High power ytterbium fiber lasers at extremely long wavelengths by photonic bandgap fiber technology

Yb-doped fiber laser operating at the long-wavelength edge (1150–1200 nm) of the broad gain spectrum has been investigated for yellow-orange sources. Power scaling in this region has been recently achieved by Yb-doped solid-core photonic bandgap fibers, in which the Yb gain profile is engineered by the sharp-cut, bandpass distributed filtering and therefore amplified spontaneous emission in the high-gain region (1030–1100 nm) is strictly inhibited. We have recently demonstrated amplification with as high as 167 W output power and 61% slope efficiency at 1178 nm. The novel gain profiling technique by photonic bandgap fibers can be extended to other rare-earth doped fibers.     

纯二氧化硅芯光纤的损耗分析

分析了纯二氧化硅芯光纤的结构和性能之间的关系，并从制备纯二氧化硅芯光纤的工艺技术角度出发，讨论了如何降低纯二氧化硅芯光纤的损耗。通过对实际拉制的纯二氧化硅芯光纤的测试，证明了这种方法是具有明显效果的。     

硫化物光纤及其功能器件的应用

本文概述了９０年代初兴起的硫化物光纤的独特性能、目前的发展状况及可能的应用前景;针对硫化物光纤实用化中的关键技术进行了分析,并对硫化纤的光敏机理作了一定的探讨。由于具有优于石英光纤的特点,硫化物光纤及其人器件具有广阔的应用前景。     

光敏光纤的研究动态

简要介绍了光敏光纤包括稀土元素掺杂光纤和塑料光纤目前在国内外的研究和发展状况。