With the Internet, high-speed IP data traffic growth, resulting in demand for transmission bandwidth is increasing. Though DWDM (Dense Wavelength Division Multiplexing) technology as the most effective way to solve the line bandwidth expansion, but CWDM (coarse wavelength division multiplexing) technology over DWDM system has advantages in cost and maintainability.

Communication with the fiber from the outer cover of plastic protective layer composed of glass as thin as a hair. Glass substantially consists of two parts: the core diameter of 9 to 62.5μm, the cover having a diameter of 125μm low refractive index of a glass material. Although according to the materials used and the dimensions of different points there are other types of fiber, but mentioned here are the most common that several. Light in the core portion of the fiber to the "total internal reflection" mode for transmission, but also refers to an end after the light enters the fiber, at the interface between the core and the cladding reflected back and forth, and then transferred to the other end of the fiber. Core diameter of 62.5μm, cladding outer diameter of 125μm fiber called 62.5/125μm light.

Fiber is the transmission of light wave conductors. Optical fiber from the optical transmission mode can be divided into single-mode fiber and multimode fiber.

With the emergence of cloud computing and accelerate the deployment of large and ultra-large-scale data, data centers, network managers must constantly readjust and further development of the network. Under the impetus of this challenge, a variety of new technologies and new standards have emerged, not only can be used to improve and optimize the network capacity, security and flexibility, while controlling costs. Let us look at the top five trends in 2015 and the network to the user's meaning.

Infiniband and Ethernet switches and related chips, high speed module vendors Mellanox, today has announced the Monash University in Melbourne, Australia will be deployed include Spectrum SN2700 open Ethernet switches, ConnectX-4 NIC and LinkX Mellanox cables, including the CloudX platform, which will is the world's first 100Gbps end-to-end OpenStack clouds.

Event Update: 10Gtek will be present at SC 15, held at the Austin Convention Center in Austin, Texas, NOV 16-19, 2015, with a booth to display its latest release: 100G QSFP28 DAC Cable, 25G SFP28 DAC Twinax Cables and optical transceivers, etc.

Yesterday, China Telecom Zhejiang company started 2015 optical modules centralized procurement tender, the tender for the procurement content Zhejiang branch of China Telecom Corporation Limited and its subsidiaries in 2015, 2016 MAN engineering and other related projects supporting the optical module products, estimated size of about 120,000 purchase.

Optical module vendors Menara network has said its direct detection tunable DWDM 100G CFP optical module has achieved volume sales. Menara also introduced its 100G Wave Master wavelength adjusting and BER tester.

Since its inception in 2007 AOC come out, the market has been volatile. Service has always been the mainstream of high-performance computer market 4x10Gbps QSFP+ AOCs is the case. Thankfully, the data center servers using 10GbE SFP+ AOCs. Accounting for a quarter of $ 87 million in 2014 AOC market. Data centers also require higher speed Ethernet: 25G, 40G, 100G, or 400G. The connection between the needs of the core router chassis AOC. This makes the AOC market in 2020 grew to $ 193 million.

IHS expects 2015 to 2019, the global network port 10G spending will grow 70%, 100G port spending will grow 262%.