cirr
ELITE MEMBER
- Joined
- Jun 28, 2012
- Messages
- 17,049
- Reaction score
- 18
- Country
- Location
我国光通信技术取得突破性进展:实现Pb/s级光传输
来源:C114中国通信网 • 2019-02-13 09:06:09
近日,从中国信息通信科技集团传来喜讯,我国光通信技术再次取得突破性进展。光纤通信技术和网络国家重点实验室、国家信息光电子创新中心、烽火通信和光迅科技经过联合研究攻关,在国内首次实现1.06Pbit/s超大容量波分复用及空分复用的光传输系统实验,传输容量是目前商用单模光纤传输系统最大容量的10倍,可以在1秒之内传输约130块1TB硬盘所存储的数据。该实验采用了国内在光传输系统技术、光器件和光芯片技术、光纤光缆技术上最领先的研究成果,标志着我国在“超大容量、超长距离、超高速率”光通信系统研究领域再次迈向了新的台阶。
该系统设备在C+L波段内产生了375个光载波,基于硅光相干收发芯片实现了25GHz通道内的178.18Gbit/s DFTs-PDM-16QAM信号光收发,在单模19芯光纤内完成了光传输验证,传输总容量达到1.06Pbit/s,净频谱效率达到了113bit/s/Hz。经第三方检测验证,此次实现的“1.06Pbit/s超大容量单模多芯光纤光传输系统”为国内首次,达到了国际先进水平。
同时,此次实验所使用的核心光芯片和光纤均为自主研制,具有完全自主知识产权。硅光相干收发芯片由国家信息光电子创新中心、光纤通信技术和网络国家重点实验室、光迅科技和烽火通信联合研制,在一个不到30mm2的硅芯片上集成了包括光发送、调制、接收等近60个有源和无源光元件,且能支持C+L波段同时工作,是目前国内集成度最高的商用光子集成芯片。这次通过工艺及技术突破,解决了单模十九芯光纤的通道间串扰难题,相邻纤芯的隔离度优于-40dB,把“车道”与“车道”之间的干扰和影响降到了最低。
China's optical communications technology breakthrough: achieving Pb/s class optical transmission
Source: C114 China Communication Network • 2019-02-13 09:06:09
Recently, the Information and Communication Technology Group from China came the good news, China's optical communication technology breakthrough again. State Key Laboratory of fiber optic communications technology and networks, optoelectronics innovation State Information Center, the flames of communication and Accelink through joint research studies in the country for the first time 1.06Pbit/s large capacity wavelength division multiplexing optical transmission systems and space division multiplexing experiments the transmission capacity is the current commercial single-mode fiber transmission system has a maximum capacity of 10 times, the data can be stored in the hard disk 1TB transmitted in 1 to about 130 seconds. The experiment uses a domestic optical transmission systems, optical devices and light in chip technology, optical fiber cable leading technology research indicates that China in the "large capacity, long distance, high rate" of optical communication systems research field again Mai to a new level.
The apparatus generates in the system C + L band optical carrier 375, a silicon-based optical coherent transceiver chip implements 178.18Gbit / s DFTs-PDM-16QAM signals in the 25GHz optical transceiver channel 19 finished in a single-mode optical fiber the optical transmission verification, a total transmission capacity of 1.06Pbit/s, the net spectral efficiency of 113bit / s / Hz. By third-party testing to verify that the realization of "1.06Pbit / s large capacity multi-core optical fiber single-mode optical transmission system" for the first time, reached the international advanced level.
Meanwhile, the core chip and the optical fiber used in the experiment were independently developed, with completely independent intellectual property rights. Silicon coherent optical transceiver chip, State Key Laboratory of optical communication technology and networks, and beacon communication Accelink jointly developed by the National Innovation Center photoelectron information, including integrated optical transmission, modulation, received on a silicon chip of less than 30mm2 nearly 60 active and passive optical components, and can support C + L-band simultaneously, is the highest degree of integration of domestic commercial photonic integrated chip. By this process and technological breakthroughs to solve the inter-channel single-mode optical fiber 19 Pin crosstalk problems, the adjacent core isolation better than -40dB, and the impact of interference between "Drive" and "lane" down lowest.
http://www.inpai.com.cn/news/tx/20190213/16515.html
China develops optic fibers that can carry 30 billion simultaneous phone calls
2019-02-14 09:09:35 Global Times Editor : Li Yan
Chinese researchers have developed an optic fiber that can carry 30 billion phone calls simultaneously, making the country one of the leaders in the ultra-high speed data transmission field.
The transmission rate is said to have reached 1.06 petabyte per second, almost twice as fast as the previous limit of 560 terabytes per second achieved by the researchers in 2017.
The experiment was recently carried out by researchers at the national key laboratory of optical fiber communication technology and network in Wuhan, Central China's Hubei Province.
The experiment is a breakthrough in the domain of "ultra-high capacity, ultra-long distance and ultra-high speed" optical communication, stated a press release sent to the Global Times by the State-owned telecommunication giant China Information and Communication Technologies Group Corp (CICT), which funded the experiment.
A domestically developed special optical fiber with single mode and 19 cores was used in the experiment, increasing transmission capacity 10 times greater than the maximum capacity provided by current commercial use single-mode optical fiber, the news release said.
The 2017 record was reached when adopting fiber with seven cores, and more cores basically means more tunnels available for information transmission, Li Shengtang, the company's spokesperson, told the Global Times on Wednesday.
"As data communication shows explosive growth, there is massive pressure on existing infrastructure networks. The 'three ultra' optical transmission provided a solution, and an adequate foundation for the coming 5G era," He Zhixue, a PhD researcher with the laboratory and a leading member for the experiment, told the Global Times.
He predicted the market demand for the three-ultra optical transmission will skyrocket in five to 10 years.
A new homegrown chip made from silicon-based material was also used in the experiment. It transforms electrical signals into optical signal at the sending end and returned them to electrical ones at the receiving end, according to the researcher.
He noted that the transmission capacity achieved during the experiment indicates the country has entered the top five in the field.