共查询到19条相似文献,搜索用时 7 毫秒
1.
文章介绍了40 Gbit/s、100 Gbit/s及以上速率超高速光通信中将会用到的新技术,包括相位调制、正交幅度调制、多电平调制等新型调制技术;偏振复用和正交频分复用这两种新型复用技术;相干接收技术原理、优点和应用必要性;光子集成技术的应用和技术发展。最后介绍了这些新技术在400 Gbit/和1 Tbit/s等超高速光通信上的应用。 相似文献
2.
介绍了相位调制、正交幅度调制、多电平调制等新型调制技术,偏振复用和正交频分复用2种新型复用技术,以及相干接收技术的原理、优点和应用,光子集成技术的应用和技术发展;最后介绍了这些新技术在400G/1T等超高速光通信中的应用。 相似文献
3.
为了研究超高速大容量光传输系统关键技术,利用16路光源,每路光源采用相干光PDM(偏振复用)16QAM(16进制正交振幅调制)OFDM(正交频分复用)调制实现了单路传输速率为1.92Tbit/s、C波段总速率为30.7Tbit/s的80km普通单模光纤传输系统。每路光源信道包含了45路光子信道,其频谱宽度为250GHz,系统谱效率为7.68Gbit/s/Hz。所有信道经过80km传输后的误码率均低于第三代FEC(前向纠错)解码门限2×10-2。 相似文献
4.
5.
6.
详细描述了240Gbit/s OFDM(正交频分复用)实时光通信系统的设计与实现。采用多载波发生装置产生3×15个相互正交的光子载波,并对每个光子载波调制4Gbaud/s速率OFDM信号,采用4QAM(二阶正交幅度调制)信号格式。在接收端,分别用对应的本征光子载波解调各路光OFDM信号,使用FPGA(现场可编程门阵列)对采样信号进行实时处理。总有效数据速率达到240Gbit/s。文章报道的传输速率为已报道实时OFDM传输的最高记录。 相似文献
7.
8.
文章回顾了光纤通信系统的最新进展,介绍了副载波调制相干光正交频分复用(SCM-CO-OFDM)技术,简述了将低速信号提升到112Gbit/s高速信号的途径,最后概述了偏振复用/相干接收技术。 相似文献
9.
从过去20多年的光通信发展史看.商用系统的速率已从45Mbit/s增加到10Gbit/s.40Gbit/s系统不久也将实用化。进一步扩容的出路是转向光的复用方式。近几年来波分复用系统技术发展十分迅猛。目前16Tbit/sWDM系统已经开始商用.日本NEC和法国阿尔卡特公司分别实现了总容量为109Tbit/s(273x40Gbit/s)和总容量为102Tbit/s(256x40Gbit/s)的传输容量最新世界记录。 相似文献
10.
11.
认为当采用低频段的射频资源时,色散导致的双边带功率衰落对正交频分复用无源光网络(OFDM-PON)的影响很小。基于时分复用(TDM)架构的OFDMPON,充分利用正交频分复用(OFDM)技术的优势与TDM架构的无色性,与现有的以太网无源光网络(EPON)、千兆比无源光网络(GPON)兼容性高,是解决上行无色性传输的最优方案。基于OFDM的时波分复用无源光网络(TWDM-PON)充分利用了OFDM调制优势,用来提升单载波容量,在不改变TWDM-PON系统结构情况下,实现100 Gbit/s的高速接入,是未来无源光网络的重要候选方案。 相似文献
12.
In order to provide more flexible and convenient service for users in the hybrid transmission network,a novel system using a single optical modulator to provide wired and single side band (SSB) wireless signal was proposed.By combining the application of dual-polarization binary phase shift keying modulator (DP-BPSK),phase shifter and other devices,wired and SSB wireless signals were directly generated to suppress the walk-off effect caused by dispersion,and the effective transmission of 5 Gbit/s SSB wireless signal carried on 40 GHz millimeter wave and 10 Gbit/s wired signal over 65 km single-mode fiber (SMF) were successfully achieved.The experiments show that the application of polarization multiplexing technology and optical subcarrier multiplexing technology can make the signal have a greater improvement in transmission rate and performance,and play an important role in the future broadband communication network. 相似文献
13.
14.
15.
Ferber S. Schubert C. Ludwig R. Boerner C. Schmidt-Langhorst C. Weber H.G. 《Electronics letters》2005,41(22):1236-1237
Error-free transmission of a 640 Gbit/s data signal over a 6/spl times/80 km dispersion-managed fibre link using the DQPSK modulation format, OTDM technology and polarisation multiplexing, is reported. 相似文献
16.
17.
Ze Dong 《中兴通讯技术(英文版)》2012,10(3):22-27
Nyquist wavelength-division multiplexing (N-WDM) allows high spectral efficiency (SE) in long-haul transmission systems.Compared to polarization-division multiplexing quadrature phase-shift keying (PDM-QPSK),multilevel modulation,such as PDM 16 quadrature-amplitude modulation (16-QAM),is much more sensitive to intrachannel noise and interchannel linear crosstalk caused by N-WDM.We experimentally generate and transmit a 6 × 128 Gbit/s N-WDM PDM 16-QAM signal over 1200 km single-mode fiber (SMF)-28 with amplification provided by an erbium-doped fiber amplifier (EDFA) only.The net SE is 7.47 bit/s/Hz,which to the best of our knowledge is the highest SE for a signal with a bit rate beyond 100 Gbit/s using the PDM 16-QAM.Such SE was achieved by DSP pre-equalization of transmitter-side impairments and DSP post-equalization of channel and receiver-side impairments.Nyquist-band can be used in pre-equalization to enhance the tolerance of PDM 16-QAM to aggressive spectral shaping.The bit-error ratio (BER) for each of the 6 channels is smaller than the forward error correction (FEC) limit of 3.8 × 10-3 after 1200 km SMF-28 transmission. 相似文献
18.
19.
本文介绍了作者设计,调试的2.5Gbit/s光发送模块的工作原理、关键技术、典型性能参数,该模块通过控制激光器温度来稳定其中心波长,为波分复用系统的应用提供了具备稳定中心波长特性的光源。 相似文献