电光调制器

英国 Halbo Optics 公司生产一种 KD~*P电光调制器,能承受峰值功率达600兆瓦/厘米~2,连续功率达200瓦/厘米~2。这种电光调制器有三种型号,即 EOM1T 型,一个电极接地,单口输入,用于 Q 开关;EOM2T 型,一个电极接地,单口输入、输出,用于行波驱动     

用纵向电光调制器测量透明材料的残余应力

基于光测弹性学中测量残余应力的基本理论，提出应用纵向电光调制器测量透明半透明材料残余应力的新方法。材料的残余应力会使通过材料后的线偏光产生相位延迟，而纵向电光调制器可以精确地调节线偏光的相位延迟，合理利用调节电光位相延迟补偿由残余应力引起的相位延迟，通过对调制电压的精确测量就能达到精确测量材料残余应力的目的。对两种标准聚碳酸酯的测量实验表明，采用这种方法测量物质残余应力装置简单，测量方便．且对残余应力的测量灵敏度容易达到λ／1000。     

调制激光用的DKDP电光晶体

随着最近光电子管的发展,电光效应的应用受到人们的重视,这次堀场制作所在日本首次研制成功了激光调制用的电光晶体(DKDP单晶)。这种DKDP单晶是把KDP晶体中的氢置换成它的同位素氘而成的,它能增强电光效应（最大重氢置换率是 99.7%)。     

DKDP电光晶体真空性能的研究

一、概述 用于晶体光阀管中的DKDP电光晶体,由于它处于真空环境并依靠电子束的轰击而工作,所以它的真空性能以及抗电子束轰击的能力对电光晶体本身是否能正常工作显得十分重要。 晶体光阀管真空性能的研究,国外早有报导,但它们只研究了电子束轰击下以及不同温度下光阀管内气体总压强的变化,没有进一步分析气氛变化的过程和气体的种类。这对保证DKDP电     

新型高速电光调制器

介绍了目前高速长距离光纤通信中常用的电光调制器的原理、结构和应用．目前半导体调制器的研究日趋成熟，性能不断改善．有机聚合物电光调制器被公认为是最具潜力的高速光通信调制器，正成为人们关注的焦点．     

有机聚合物电光调制器

有机聚合物电光调制器被公认为最具潜力的高速光通信调制器，正成为人们关注的焦点。介绍了有机聚合物E-O电光材料的特点及研究进展。给出了两种基于有机聚合物的调制器的结构、原理并进行了性能比较。     

激光器的电光调制器

本文比较了应用电光调制器进行的激光器内外振幅调制。如果激光器增益与调制器损耗之比很高，内相位调制就能给出较高的信号输出功率和较好的信噪比，效率也较高。     

SiGe电光调制器研究进展

光子调制器是光纤通信系统中的核心器件,主要对光信号进行调制,实现信号从电域到光域的转换。随着硅基半导体工艺的发展,硅基光子调制器逐渐成为了主流硅光子器件,基于硅工艺技术的GHz带宽调制器的实现也为硅光子学的发展奠定了基础。作为一种用于短距离光互连的高性能光调制器,SiGe光吸收调制器受到了较多关注。文中讨论了高性能SiGe电光调制器的发展现状,对国内外硅基光子调制器的研究进展进行分析,讨论了PIN、PN结等电学调制结构,为研发高速率、低损耗的光子调制器提供了思路。     

新型LiNbO3电光调制器

LiNbO3电光调制器是用于高速光通信系统最有希望的器件,已成为国内外研发的热门器件.目前已开发了多种类型的LiNbO3电光调制器,本文介绍了几种新型LiNbO3电光调制器.     

微机电光调制器技术研究

调制器是光纤系统的重要器件。硅基微机械光调制技术使用常规硅平面工艺方法,制作较为简单、成本较低。同时,又具有高数据速率（几Ｍｂ／ｓ）和宽频带（１．３μｍ～１．５μｍ）性能,满足日益增长的波分复用（ＷＤＭ）全光网络发展的需要。讨论了有关硅基微机械式光调技术的基本原理和一些相关的制作方法,制作了多层膜光反射调制样品。     

Optimisation of electro-optic crystal modulators

A general method is given for the optimum design of electro-optic light modulators in respect of minimum halfwave voltage for crystals of any class. Examples are given for materials of class 42m (XDP).     

Organic electro-optic polymer materials and organic-based hybrid electro-optic modulators

High performance electro-optic modulator, as the key device of integrated ultra-wideband optical systems, have become the focus of research. Meanwhile, the organic-based hybrid electro-optic modulators, which make full use of the advantages of organic electro-optic (OEO) materials (e.g. high electro-optic coefficient, fast response speed, high bandwidth, easy processing/integration and low cost) have attracted considerable attention. In this paper, we introduce a series of high-performance OEO materials that exhibit good properties in electro-optic activity and thermal stability. In addition, the recent progress of organic-based hybrid electro-optic devices is reviewed, including photonic crystal-organic hybrid (PCOH), silicon-organic hybrid (SOH) and plasmonic-organic hybrid (POH) modulators. A high-performance integrated optical platform based on OEO materials is a promising solution for growing high speeds and low power consumption in compact sizes.     

高效微带线聚合物电光调制器的研制

设计、制作并测试了1.55 m 光波长的微带线行波电极电光调制器。如果聚合物材料的电光系数33=30 pm/V,中心电极L 为20 mm,设计的调制器性能参数半波电压为6.70 V。用自主合成的发色团分子组成二阶非线性光学聚合物材料做为芯层制作的聚合物调制器,对调制器的各项性能参数进行了直流、低频和微波性能的测试,采用不同极化方法,在1.55 m 波长上测得低频半波电压分别为10.5 V(电晕极化)和4.9 V(接触极化),折算得芯层材料的电光系数分别为21 pm/V 和45 pm/V。测得消光比为24 dB。用矢量网络分析仪测试电极系统的微波性能,S 参数反映了此电极系统具有低的微波传输损耗和反射损耗。     

Rapid direct fabrication of active electro-optic modulators in GaAs

We have developed several direct-write laser processing techniques to masklessly fabricate prototypes of waveguiding devices in GaAs/AlGaAs substrates. This flexible technology allows the rapid, successive fabrication and testing of devices such as modulators. Previously, we had reported use of this technology to fabricate low-loss single-mode passive waveguiding structures and devices. In this paper, we report the fabrication of active electro-optic modulators. These devices include an electro-optic polarization modulator, an integrated amplitude modulator consisting of a polarization modulator and an on-chip polarizer, and an integrated Mach-Zehnder interferometer     

Limitations of zinc sulphide leaky waveguide electro-optic modulators

Design criteria for relative-phase optical-waveguide modulators are established for single-crystal thin films of zinc sulphide grown on silicon. It is found that the minimum guide length is limited by voltage breakdown to 2 mm while for high frequency applications, because of the leaky nature of the guiding region, the maximum available length and thickness of zinc sulphide are the limiting factors.     

Optical time-division multiplexing signal processing using electro-optic modulators

We present some optical signal processing methods for optical time-division multiplexing, based on electro-optic modulators. Dual-parallel Mach–Zehnder modulator and time-lens-based signal processing for optical frequency comb generation, optical Nyquist pulse generation and time-domain demultiplexing are realized. Multifunctional optoelectronic oscillators which are capable of performing simultaneous electrical clock recovery, optical clock recovery and demultiplexing are demonstrated with modulators embedded as the key components.     

Integration of GaAS MESFET drivers with GaAs directional-coupler electro-optic modulators

We demonstrate the first integration of active electronic devices with semiconductor waveguide modulators. By combining ion-implanted GaAs MESFET amplifiers with directional-coupler electro-optic modulators, the DC drive voltage has been reduced by a factor of ?v = 9, making an effective electro-optic figure-of-merit ?vn3r41 for GaAs superior to that of LiNbO3     

High-speed gray-binary and binary-Gray code convertors using electro-optic light modulators

A high-speed Gray-binary code convertor (g.b.c.) using electro-optic light modulators, which translates all bits of Gray code into binary code simultaneously, and a binary-Gray code convertor, which translates binary into Gray code, are described. A digital-analogue convertor using g.b.c. is also presented.