Huawei's coherent CDMA metro
optical transmission prototype supports access of 32 nodes on a single wavelength, to allow the same wavelength to be shared by multiple nodes by allocating different orthogonal spreading codes to each node.
After the
optical transmission path, a modeling is going on by a demodulator block, in which the signal after passing through the optical path model is entering [12-15].
The key technologies that enabled ultra-high speed
optical transmission of 400Gbps-class/channel are as follows.
The
optical transmission network to be constructed will pass through Hubei and Sichuan provinces and Chongqing Municipality, covering 55 stations and 1,500 kilometres.
TOKYO -- Fujitsu Limited (Fujitsu), Nippon Telegraph and Telephone Corporation (NTT) and NEC Corporation (NEC) today announced the commencement of joint research and development toward making the world's top-level,400Gbps/channel-class digital coherent
optical transmissions technology (*1).
As a pioneer in Beyond-100G technology, ZTE has been creating new 400G single-carrier transmission records to lay a solid foundation for researches on single-carrier higher-rate
optical transmission technologies.
The joint research will enable ultra-high-speed 400Gbps-class
optical transmissions through the use of dual-polarization quadrature phase shift keying (DP-QPSK)(3), which is currently in use for 100Gbps transmissions, together with dual-polarization 16 quadrature amplitude modulation (DP-16QAM)(4), which takes advantage of an even greater number of quadrature carriers.
The 1FINITY platform is a new
optical transmission system that disaggregates each function-transport, lambda, switch, and access-into individual 1RU(4) blades.
The dissemination of optical access networks that directly connect households via optical fibers and the construction of next generation networks have led to a increasing demand for greater capacity in inter-city
optical transmission networks.
The second technology enables the wireless system to automatically choose between
optical transmission and radio transmission, depending on application environments.
LightPointe, a designer and manufacturer of carrier-class
optical transmission equipment using Free-Space Optical (FSO) technology, has announced a strategic alliance with Texas Instruments, enabling development of new FSO systems.
Funds to Accelerate Deployments of 40 Gbps
Optical Transmission Systems
