Friday, April 15, 2016

Optical Transceivers

Optical Transceivers 
CXP Optical Transceiver
CXP is often used in the field of computer networking, referring to the hot-swappable input/output devices. It supports 100 Gigabit Ethernet and offers users a great number of high-density 100Gbps connectivity solutions to enable more flexibility of interface choice. The CXP module focus on use in data center, core-routing, and high-performance computing applications and the speed is supposed to reach up to 150Gbps links over multimode fiber.
QSFP28
The QSFP is a compact, hot-pluggable transceiver which is widely used in data communication applications. As the technique in the field of networking advances, a better version of the original one is developed, knowing as the QSFP to achieve higher data rates. The QSFP enables the data transmit rate to reach as high as 4×28Gbps, with the high port densities, the compact size and low power consumption, it improves the work efficiency to a large extent.
BiDi (Bi-Directional) SFP
The BIDI SFP refers to a compact optical transceiver module which can be used in both telecommunication and data bidirectional communication applications. As a popular industry format that captures a relatively large proportion of the market, it draws much attention of the fiber optic opponent manufacturers. Produced either with SC or LC simplex port, the BIDI SFP can be used for both transmission and receiving with the wavelength combination. Two different optics are necessary to form the link.
WDM
The WDM stands for wavelength-division multiplexing in the field of fiber-optic communication. By using laser light of different wavelength, it multiplexes some optical carrier signals onto one optical fiber. The WDM makes it possible for bidirectional communication over one strand of fiber as well as multiplication of capacity. The WDM is widely used to multiply the effective bandwidth of a fiber optic communications system, and with a fiber optic repeater device, it can become a cost-effective long-term solution.
CWDM
The CWDM refers to the coarse wavelength division multiplexing which is a technique used to combine multiple signals of different wavelength on laser beams for transmission along fiber optic cables. It owns fewer channels than that of DWDM. With channels at wavelengths spaced 20nm apart, it enables the use of low-cost, uncooled lasers. As the CWDM usually use lasers with lower precision, the CWDM system is much cheaper and consumes less power.
DWDM
The DWDM stands for the dense wavelength division multiplexing, which serves as a method to combine data from different sources together to an optical fiber. During this process, while on its own separate light wavelength, every signal is carried at the same time. The DWDM enables up to 80 or more separate wavelengths or channels of data to be multiplexed into a light stream transmitted on a single optical fiber. DWDM now is expected to be the central technology in the all-optical networks of the future.
 

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