搜索结果: 1-15 共查到“光学工程 ROF”相关记录22条 . 查询时间(0.055 秒)
提出了一个基于偏振调制的最佳接收灵敏度ROF链路系统。其根本原理在于实现具有最佳光载波边带比(OCSR)的光单边带调制技术,为此,利用偏振调制和滤波技术,线偏光首先经由一个特定偏振角α进入偏振调制器,然后一个固定起偏角β的起偏器被用来合并偏振信息,最后利用一个光滤波器实现光双边带调制到光单边带调制的转换。研究发现所获得的OCSR只与两个偏振角(α和β)有关,通过仔细调节上述指标,可以将OCSR调谐...
三角波扫频的可调谐毫米波RoF下行链路性能分析
光载无线电 毫米波 三角波 光纤布拉格光栅
2016/8/2
理论提出了一种获得高倍频因子的毫米波产生方案并对产生毫米波的RoF下行链路性能进行分析。方案中利用三角波替代正弦波来驱动双驱动马赫增德尔调制器。通过三角波扫频,可以产生更多的频率分量。均匀光纤布拉格光栅可以选择出所需的频率分量进行拍频产生毫米波信号。倍频因子的调谐可以通过调节两个均匀光纤布拉格光栅的中心波长来实现。方案可获得倍频因子分别为4,6,8,10,12 mm的波信号,并对各种倍频因子下的R...
基于相移超结构光栅的ROF单边带调制系统
光载无线 相移超结构光栅 透射谱 单边带调制
2016/7/28
提出了一个利用相移超结构光栅构建的典型ROF单边带调制系统。改变倾斜角,光栅就会呈现不同的传播特性。将不同的相移插入光栅的不同位置就会得到不同的透射谱特性。因此该光栅可视为滤波器应用于单边带调制系统中。反射谱的负斜率特性使得低阶边带会经历更高的衰减。所以,仅仅使用一个相移超结构光栅就可以简单地实现双边带到载波单边带的转换。与此同时,还可以通过改变光栅的倾斜角优化光载波抑制比。在实验中,60 GHz...
Analysis of the Impact of P-Ratio on BER, Q-Factor and OSNR of Radio over Fiber (RoF) System
Rof System OSNR Parameter BER Q-Parameter Fiber Dispersion Matlab 7.0
2013/1/30
The impact of p-ratio i.e. ratio of carrier power to total received RF power at control office (CO) on Bit error rate (BER), Q- performance parameter and Optical signal noise ratio (OSNR) of RoF commu...
31 Gbps RoF System Employing Adaptive Bit-Loading OFDM Modulation at 60 GHz
Optical Communications Modulation
2015/5/26
Record wireless data transmission of 31.4 Gbps within 7 GHz license-free band at 60 GHz is experimentally demonstrated using adaptive bit-loading OFDM modulation. Adaptive bit-loading OFDM also enable...
A Novel Scheme for Seamless Integration of ROF System with OFDM-CPM WDM Passive Optical Network
Networks Fiber optics communications
2015/5/26
A novel scheme to generate, transmit and receive an optical OFDM-CPM signal in the architecture for seamless integration of ROF system with 4 × 2.5Gb/s WDM-PON is proposed and experimentally validated...
A Novel Wireless over Fiber Access Architecture Employing Moving Chain Cells and RoF Technique for Broadband Wireless Applications on the Train Environment
Networks ptical communications
2015/5/26
We have demonstrated a hybrid optical/wireless system based on moving chain cells and radio-over-fiber techniques. This scheme can improve power efficiency, cell-edge coverage,system throughput and fl...
Broadband Ubiquitous Network Based on RoF-DAS over WDM-PON
Fiber optics communications Networks combinatorial network design
2015/5/26
This report is the first demonstration of RoF-DAS over WDM-PON with TDM techniques to realize a broadband ubiquitous wireless access with a gigabit-class throughput. The optical transmission performan...
Rival Signals in SOA Reach-Extended WDM-TDM-GPON Converged with RoF
Fiber Optics Optical Communications Networks Semiconductor Optical Amplifier
2015/5/26
The crosstalk of rival RoF and GPON subscribers on a RoF signal in converged RoF–WDM-TDM-GPONs with SOA as reach extender is studied. SOA nonlinear crosstalk can be mitigated by control of subscriber ...
Demonstration of Converged Bidirectional OFDM-m-QAM RoF and WDM-OFDM-PON Access Networks
Networks Optical communications
2015/5/26
We demonstrate a novel lightwave centralized hybrid bidirectional WDM-OFDM-PON and OFDM-m-QAM RoF network. The 11.29-Gb/s OFDM-16QAM wired DL, 5.65-Gb/s OFDM-QPSK wired UL and WiMAX downstream/upstrea...
Field Demonstration of Bi-directional Millimeter Wave RoF Systems Inter-operable with 60 GHz Multi-gigabit CMOS Transceivers for In-building HD Video and Data Delivery
Optical communications Radio frequency photonics
2015/5/21
We demonstrate, for the first time, a bi-directional in-building radio-over-fiber access network to deliver multi-gigabit, high-definition video and data services using all-optical conversion at the h...
Multi-Gbps ASK and QPSK-modulated 60 GHz RoF Link using an Optically Injection Locked VCSEL
Radio Frequency Photonics Vertical cavity surface emitting lasers
2015/6/9
A 60 GHz RoF transmitter employing an optically injection locked VCSEL is demonstrated for the first time. Multi-Gbps ASK and QPSK at 60 GHz after 20 km fiber and 3 m wireless transmission is shown.
All-Optical up-conversion 10-Gb/s signal in 60-GHz ROF system using 2-m Bismuth Oxide-based fiber
Fiber optical communications Fiber optics links subsystems
2015/6/8
All-optical up-conversion based on dual-pump four-wave mixing (FWM) in 2-m Bismuth Oxide-based fiber for 10-Gb/s OOK wireless signals in 60-GHz ROF systems has been experimentally demonstrated for the...
Full Colorless WDM-RoF System with Simultaneous Transmission of 63-GHz and Baseband 1.25-Gbps Data by Sideband Separation
Fiber optics communications Optical communications
2015/6/8
The radio over fiber system that transmits 63-GHz-band and baseband signals simultaneously based on WDM system is proposed. 63-GHz tone is generated by optical carrier suppression method using MZM. RS...
Broad Convergence of 32QAM-OFDM ROF and WDM-OFDM-PON System Using an Integrated Modulator for Bidirectional Access Networks
Networks Optical Communications
2015/6/4
We propose and demonstrate a novel architecture of converged 32QAM-OFDM ROF and WDM-OFDM-PON by employing an integrated modulator. The 10Gb/s 16QAM-OFDM wired signal, 1Gb/s 32QAM-OFDM wireless signal ...