多模光纤

多模光纤耦合LD输出光束的空间耦合技术

Space Coupling Technology of Multi-mode Fiber Coupling LD Output Beams

实验研究了LD输出激光束经过望远镜系统、多模光纤系统和锥形塑料光纤系统三种系统后的光束远场特性。

The far-field characteristics when LD goes through telescope system 、 multi-mode fiber system and tapered plastic optical fiber system are studied .

OFDM多模光纤通信中自适应调制算法研究

Study on Adaptive Modulation Algorithm in OFDM Multimode Fiber Communication

用ME99C准确测量大NA的62.5/125多模光纤带宽

Accurately Measure the Bandwidth of Large NA 62.5/125 Multimode Fibers by ME 99C

MIMO多模光纤通信中基于ICA的信号分离技术研究

Research of Signal Separation in MIMO Multimode Fiber Communication Based on ICA

大功率LD与多模光纤的直接耦合

Direct coupling of high power LD to the multi mode optical fiber

并且采用本实验的方法，也可以制作n×1（n大于3）的多模光纤耦合器。

Moreover , using the same methodes , the n × 1 ( n ≧ 3 ) optical fiber coupler can be made .

分别在单模和多模光纤光纤中成功地写入FBG。

FBGs have been successfully written in both single-mode and multimode fibers .

用单透镜会聚多模光纤出射的YAG激光为较小光斑的分析讨论

Analysis and Discussion on Obtaining Small Focal Spot by Use of Convex Lens for YAG Laser Transmitted through Multimode Fiber

Fabry-Perot型全多模光纤电流传感器及其信号处理

An All Multimode Fiber Electric Current Sensor With Fiber Fabry-Perot Interferometer and Its Signal Processing

多模光纤的模耦合效应与Fokker-Planck方程

Mode Coupling Effects and Fokker-Planck Equation of Multimode Optical Fibers

采用在一个玻璃衬底上，具有两个不同曲率半径的双曲面透镜实现LD与多模光纤的耦合。

A double-curved lens with two crossed cylindrical lenses structured on both sides of the glass substrate is used in the coupling system .

并且应用了多模光纤传感器和FBG传感器，使测试结果更可靠。

Because multimode fiber sensors and ' FBG sensors are simultaneously used in the system , the result of measurement is more reliable .

其他与多模光纤ROF技术相关，可以进一步提升信道通信能力的新技术、新概念也一起做了探讨。

At last , some other new technologies about ROF with multimode fiber are recommended .

以LED作光源、PIN作接收、火石玻璃为磁感应材料、多模光纤作导光波导的混合型大电流光纤传感器，用于监视高压电网系统中的电流。

The hybrid large current fiber sensor consists of a LED as light sourse , PIN as light receiver , flint glass as magnetic inductor and multimode fiber as light conductor .

该传感器由一段多模光纤中间插入并熔接一小段单模光纤组成，且单模光纤包层表面涂覆一层含笼形分子E的透明聚硅氧烷薄膜。

The sensor consists of a multimode fiber in which a short section of standard single-mode fiber , coated with the inclusion of cryptophane molecules E in a transparent polysiloxane film , is inserted .

此外，本文提出了使用成熟商用器件搭建实际的QKD系统时，面临的空间光-多模光纤耦合的问题。

Moreover we put forward the challenge of spatial-light-to-multi-mode-fiber coupling when using commercial devices to built QKD systems .

从理论和实验上研究了不同焦距下泵浦能量以及透镜与光纤间距对多模光纤中的SBS能量反射率和脉冲波形的影响。

The influences of pump energy , focal length and distance between fiber and lens on SBS reflectivity and waveform in multimode fiber are investigated theoretically and experimentally .

大模场面积（LMA）多模光纤激光器的输出性能与光纤的弯曲程度有关。

The output capability of large mode area ( LMA ) multimode fiber laser depends on the fiber bending .

利用ZEMAX软件进行多模光纤准直器的设计。

A method to design muti-mode fiber collimator by using ZEMAX software is introduced .

本文报道在1.32μm声光Q开关Nd：YAG激光器泵浦下，从多模光纤中获得由受激喇曼散射及四光子混频产生的宽带非线性散射谱的实验。

Generation of wideband Raman scattering spectra in multimode optical fibres , pumped by an 1.32 μ m A-O Q-switched Nd : YAG laser , is reported . Discussion shows that the spectra are generated by stimulated Raman scattering and four-photon mixing .

其次，研究了RoF链路的传输特性，给出了多模光纤传输特性和RoF链路的非线性表达式。

Secondly , the nonlinearity of RoF link has been studied . The function of multimode fiber transmission characteristics and the expression of the nonlinearity of RoF link are given .

当多模光纤弯曲半径小于5mm时，损耗变得很大。

A numerical simulation shows that the bending loss of a circular multimode fiber becomes larger as the curve radius of the fiber is less than 5 mm .

本文测量了100130150和180℃下、1atm氢气氛中的MCVD多模光纤损耗谱的变化。

Spectrum attenuation changes for MCVD optical fiber exposed to a hydrogen atmosphere at 100 , 130 , 150 and 180 ℃ are measured .

对多模光纤，建议在光纤成缆和施工中，其弯曲半径至少大于80mm。

For standard communication multimode fibers , the bending radius is suggested at least larger than 80 mm in jacketing and installation .

在充分的理论调研基础上，完成了UWB信号的产生，研究了UWB信号在光纤上的传输及其拓扑结构，设计了基于多模光纤的UWB光纤传输系统。

In the full theory based on research , UWB signal generation is completed , UWB signal transmission in the fiber and its topological structure is studied , and a UWB over fiber system based multi-mode fiber is designed in this dissertation .

本文就光纤Bragg光栅的反射特性进行了数值仿真和实验研究，主要对折射率剖面非均匀的少模和多模光纤光栅的反射谱进行了仿真和实验测量。

In this dissertation , the reflection characteristics of fiber Bragg grating have been numerically and experimentally studied . The reflection spectrums of few-mode and multi-mode fiber Bragg grating ( MM-FBG ) with non-uniform profile of index change have been numerically simulated and measured .

利用高斯光束理论模拟了多个模式在VCSEL出射端的衍射现象。其次，多模光纤作为短距离通信的首选媒介，它对于不同的激励条件会激发出不同模式。

The diffraction of output signal can be modeled in Gaussian beam theory . Secondly , as the first medium in short range communication , the Multimode Fiber may generate different mode with different excitation .

推导了出射高斯光束的束腰半径和工作距离的解析表达式，进而对该光纤透镜做了数值模拟，讨论了无芯光纤和GRIN多模光纤的长度对光纤透镜参数的影响。

In addition , analytic expression of the waist spot size and working distance of output Gaussian beam were derived , and the influence of coreless fiber and GRIN fiber ′ s length upon fiber-lens parameter was discussed by numerical simulation results .

与单模或多模光纤相比，光纤准直器的光束平行度更高、光束发散角更小（小于0.25度）、工作距离更长（约10cm）、光束耦合效率对入射角更敏感。

Compared to the single-mode fiber and multi-mode fiber , collimator has higher parallel light beam , smaller beam divergence ( 0.25 °), longer working distance (~ 10cm ) and higher sensitivity coupling efficiency .