光子集成技术在波分多路系统的应用

本文介绍光子学的一种新趋向，即光子集成（ＰＩＣ）技术在波分多路（ＷＤＭ）光纤通信系统应用的初步尝试。在说明ＷＤＭ系统在高速光纤通信网的重要性和ＰＩＣ技术在ＷＤＭ系统应用的必要性之后，本文列举Ｂｅｌｌｃａｒｅ最近研制ＰＩＣ／ＷＤＭ取得初步成功的两个例子：一是多路光载波的ＭＱＷ／ＤＦＢ激光管阵列，用于ＷＤＭ发送机；二是ＩｎＰ平面反射光栅合波／分波器，有助于ＷＤＭ网中各种功能器件的集成。     

集成光学:元件集成

用高容量的光波系统经济有效地传输信息,目前已在多方面应用.将来,光波系统也可以通过直接光学处理来转换信息和完成其他功能,因此光编码的信息能够直接传输到终端而不需要中间转换成电的形式. 能实现这种功能的回路称为“集成”光路或光子回路.这类回路中还能够加进用制造光波元件的材料制     

微波光子集成及前沿展望（特邀）

微波光子学是一门融合了微波技术和光子技术的交叉学科,是研究光波和微波在媒质中的相互作用以及在光频域实现微波信号的产生、处理、传输及接收的微波光波融合系统。由于现有的微波光子系统大多由分立器件组成,在体积、功耗、稳定性、成本等方面仍有待提升,因此集成化是微波光子技术发展的必然趋势。文中探讨了微波光子集成技术面临的主要科学与技术问题,总结了该技术的发展现状和前沿研究进展,并对其未来发展前景进行了展望。     

异质集成微波光子器件发展现状

微波光子学利用光子技术实现微波信号的产生、传输、处理及控制,可突破传统微波技术在带宽、传输损耗和抗电磁干扰等方面的瓶颈,提升雷达、电子战等信息系统的综合性能.激光器、电光调制器和光电探测器是微波光子技术中的三种核心光电子器件,其性能对微波光子链路的噪声和动态等指标具有决定性的影响,但基于分立器件的微波光子系统体积、重量较大,难以满足雷达、电子战等系统的阵列化需求,硅基异质集成技术以及高密度低损耗片上光传输互连技术是解决有源器件集成和无源器件集成的关键技术.文章介绍了用于微波光子的硅基激光器、电光调制器、光电探测器和波导的异质集成技术的发展现状,并探讨了集成微波光子技术的发展趋势.     

InP基环形波导激光器的研究与进展

光子集成作为未来全光网络发展的必然趋势,是实现高速光通信的重要解决方案。正如硅基集成电路的发展历程一样,找到一种类似晶体管的基本集成单元,并实现光子集成的大多数功能是目前光子集成技术中最迫切的问题。近年来,由于半导体环形谐振器的功能多样性和可集成性,使其最有可能成为光子集成的基本单元,因而成为集成光子学、光通信和光信息处理领域的研究热点。文章在介绍半导体环形激光器工作原理和基本特性的基础上,总结了InP基环形波导激光器在集成光源及光信息处理方面的应用和最新进展。     

微波光子与多学科交叉融合的前景展望(特邀)

微波光子学可借助光电子器件实现微波信号的产生、处理、接收和分配等功能，具有宽带、低传输损耗、轻重量、快速可重构及抗电磁干扰等优势。随着微波光子学的理论方法和技术应用的不断发展，微波光子与多学科交叉融合成为其核心发展方向。文中对微波光子与部分学科交叉融合的现状进行了总结，并对微波光子与激光技术、集成光电子学、量子技术和人工智能等前沿学科的交叉融合进行了展望。     

聚合物纳米光子器件

控制光信号在亚波长或纳米尺度的波导巾传输对实现超紧凑的光子学器件和高密集的集成光路十分重要,因为它代表着集成光学向集成纳米光子学的迈进.人们已用光刻技术制作出基于金属材料的表面等离子体纳米波导、基于平面介质材料的纳米光子线波导、光了晶体波导等,也通过自组装等方法或技术制作出基于半导体材料或有机聚合物材料的纳米结构等.聚合物纳米线由于具有良好的机械性能,尤其是其弹性和柔韧性非常好,而且可以通过化学设计改变其材料的特性.因而,是构筑超紧凑光子学器件和微型化集成光路的最佳选择之一.借助化学合成法、激光烧蚀法、静电纺丝法、微纳吸管法、近场探针拉制法、尖端阵列法等制作出的各种聚合物纳米纤维也有报道.     

前言北大核心

微波光子技术是微波与光子学两大领域优势相结合的交叉学科,其核心是探索微波与光波在媒质中的相互作用,研究微波在光域产生、传输、处理以及控制等方向的新机理、新方法、新技术和新应用,解决微波、光子学领域的发展和应用瓶颈。近十年来,微波光子技术的发展日新月异。首先,随着以半导体激光器、高速光电调制、探测、放大以及光纤光学为代表的基础器件领域的长足发展。     

微波光子异质/异构集成技术

微波光子芯片是支撑微波光子学发展的基石。针对微波光子芯片材料体系多样、难以多功能集成等问题,异质/ 异构集成技术提供了一种有效途径。该技术可将不同材料体系的最优性能器件集成到同一芯片上,大大扩展微波光子芯片的功能,降低微波光子功能模块的体积、重量,并提高其性能稳定性。本文介绍了目前主流的微波光子异质/ 异构集成技术和光电混合集成方面的主要研究进展,并对未来发展趋势进行展望。     

光有源器件中的光集成技术演变

从光集成技术在光有源器件中的应用与发展的角度出发,结合硅光平台、平面光回路、光子集成回路以及光电子集成回路等基本的光集成技术平台,分析了光有源器件中的光集成技术的演变趋势,并给出了对未来光集成技术发展的展望。     

2D Tellurium Based High‐Performance All‐Optical Nonlinear Photonic Devices

Tellurium (Te), as one of the rarest stable solid elements far more common in the universe than on earth, is a p‐type semiconductor with excellent optical properties. Herein, a novel two‐dimensional (2D) Te nanosheets (Ns)‐based air‐stable nonlinear photonic devices: all‐optical switcher and photonic diode, owing to its strong light–matter interaction in the visible‐to‐infrared band are reported. The findings validate that the proposed photonic diode can be utilized for the function of nonreciprocal light propagation in optical telecommunications or integrated photonics. Moreover, 2D Te‐based light‐modulate‐light system is successfully designed to realize “ON” and “OFF” modes for all‐optical switching operation. This work highlights a good promise of 2D Te in the field of nonlinear photonics, leading to an important step toward 2D Te‐based advanced photonics devices. The versatile solution process allows a universal access of 2D Te as a new 2D material in a wider range of photonics device applications such as, detector, modulator, switcher, etc.     

Breaking through the barriers [semiconductor lasers]

In this era of high-end microelectronic integrated-circuit processing there are numerous examples of practical circuit designs containing many tens of thousands of transistors. The state-of-the-art for semiconductor photonic integrated circuits-those in which the information is carried entirely by optical rather than electrical signals-has been limited, however, to only a handful of devices. This article outlines two of the critical barriers to photonic integration and describes some recent advances in the technology that contribute to overcoming those barriers. Some examples of the implementation of these technologies are also presented     

微波光子网络的可重构与智能化（特邀）

高性能的光子模拟处理芯片是微波光子处理系统的核心部件,文章通过优化光波导网络结构,实现了一种超宽带可重构的光子模拟运算芯片,通过配置拓扑网络结构实现了多种运算功能的任意切换以及同种功能的运算阶数可调谐。同时,研究了具有自配置能力的光学矩阵计算芯片,以及用于图像处理的片上光子卷积加速器。最后,对微波光子系统与人工智能的交叉融合进行了展望。     

Terahipas: a modular and expandable terabit/second hierarchicallymultiplexing photonic ATM switch architecture

A terabit/second hierarchically multiplexing photonic asynchronous transfer mode (ATM) switch network architecture, called Terahipas, is proposed. It combines the advantages of photonics (a large bandwidth for transport of cells) and electronics (advanced logical functions for controlling, processing, and routing). It uses a hierarchical photonic multiplexing structure in which several tens of channels with a relatively low bit rate, say 2.4 Gb/s, are first time-multiplexed on an optical highway by shrinking the interval between optical pulses, then a number of optical highways are wavelength-multiplexed (or space-division multiplexed). As a result, the switch capacity can be expanded from the order of 100 Gb/s to the order of 10 Tb/s in a modular fashion. A new implementation scheme for cell buffering is used for eliminating the bottleneck when receiving and storing concurrent optical cells at bit rates as high as 100 Gb/s. This new architecture can serve as the basis of a modular, expandable, high-performance ATM switching system for future broad band integrated service digital networks (B-ISDN's)     

硅光子器件及其集成技术的研究

主要探讨了偏振分集光路、可调光衰减器、波导耦合型锗光电探测器等硅光器件的研究进展,分析了其结构及技术参数,随后探讨了VOA-PD单片集成技术以及VMUX单片集成技术两种硅基单片集成技术,指出硅光子器件的性能指标已经能满足现代光纤通信系统的要求。     

155Mb／s时分光交换系统

本文介绍了国内第一个１５５Ｍｂ／ｓ时分光交换实验系统。系统以新型半导体光器件－半导体光开关门为核心构成，传输速度为１５５Ｍｂ／ｓ。     

Wavelength switching components for future photonic networks

This article provides a review of integrated laser and semiconductor optical amplifier components that have been configured to provide a variety of all-optical functions such as wavelength conversion, routing, signal regeneration, and add-drop multiplexing. The components have been devised so that they can be reliably and simply used within a multiwavelength network. The article introduces the components by outlining the current leading techniques for wavelength conversion using SOAs, namely by way of cross-gain modulation, cross-phase modulation, and four-wave mixing. The integrated SOA distributed feedback laser is then shown to provide excellent regeneration properties, not only overcoming fiber dispersion limitations but also polarization mode dispersion. Finally, the devices are shown to make possible a regenerative wavelength switching node where routing is achieved using a tunable laser to provide regenerative wavelength conversion followed by an arrayed waveguide router. This switch shows promise for use in future photonic packet switching architectures