The backbone optical communication networks are an essential infrastructure supporting the networked society. They are used for the internet phone and video demand services and for business activities and public services and offices in order to provide more stress–free communication and better services.
Here introduce 100G technology a 100 gigabit per second digital coherent optical receiver which can be used to transmit 10 terabits per second of data over a single fiber.
The first development was the use of time–division multiplexing. This made it possible for a single fiber to carry data at 10 gigabits per second.Here introduce 100G technology a 100 gigabit per second digital coherent optical receiver which can be used to transmit 10 terabits per second of data over a single fiber.
What Is Digital Coherent Transmission Technology?
Let's outline the history of the technical development that allows us to send a large capacity of information over an optical fiber before explaining this.Time–Division Multiplexing
Wavelength–Division Multiplexing
The next–generation was to adopt wavelength–division multiplexing by using 40 wavelengths each capable of 40 gigabits per second transmission it became possible to send 1.6 terabits per second of data over a single fiber.Digital coherent Transmission
Now comes digital coherent transmission which is the most attention-grabbing technology today. This technology increases transmission capacity by using optical phase and polarization information the receiver extracts information by mixing the received light with a light from a local light source. Since a laser beam is normally polarized, it is possible to double the transmission capacity by using two orthogonal E polarized waves as different channels. In addition, instead of using binary values of on and off.
We have implemented a system base on 28 to 32 gigabit per second transmission. We have doubled the transmission capacity by using phase information and further doubled it by using polarization information thereby achieving 100 gigabits per second transmission over a single wavelength by using about 100 wavelengths. It is possible to achieve 10 terabits per second transmission on a single optical fiber.
An optical receiver receives the phase and polarization information of digital coherent optical signals. It consists of three elements a passive optical circuit which is a silica base planar lightwave circuit or PLC a high–speed photodiode or PD array which is an optical semiconductor and a transimpedance amplifier which is a high–speed electronic device. This means that to implement a high-quality optical receiver. It is necessary to integrate silica-based PLC technology, optical semiconductor technology and high–speed electronic device technology.
Conclusion
Coherent optics provides the performance and flexibility to transport significantly more information on the same fiber. Coherent optical technology forms the foundation of the industry’s drive to achieve transport speeds of 100G and beyond, delivering terabits of information across a single optical fiber. And coherent optics enables greater network flexibility and programmability by supporting different baud rates and modulation formats. This results in greater flexibility in line rates, with scalability from 100G to 400G and beyond per single signal carrier, delivering increased data throughput at a lower cost per bit.Gigalight 100G CFP-DCO Digital Coherent Optical Transceiver is a hot-pluggable CFP form-factor optical module designed for high-speed optical networking applications including 100-Gigabit Ethernet and OTU4. The CAUI and OTL4.10 electrical interface and MDIO management interface are built in the module.
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