Transmission Technologies
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The document discusses optical fiber transmission networks using dense wavelength division multiplexing (DWDM) technology. It describes the different types of optical fiber, wavelength bands used in DWDM systems, and how DWDM works by transmitting multiple traffic channels on different wavelength signals over the same fiber pair. The document also covers DWDM system building blocks, wavelength grids, network topologies using DWDM components like optical add/drop multiplexers and reconfigurable optical add/drop multiplexers. It concludes with a reference to the Ethernet development roadmap.
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Transmission Technologies
- 1. Transmission Network KHNOG 27Jan2016 Content 1. Optical Fiber & Spectrum 2. DWDM Technology 3. DWDM vs OTN 4. Network Topology 5. Ethernet Development Roadmap SARITH HOM (Mr.)
- 2. fiber Single-Mode Fiber (SMF): 1. Core 8 µm diameter 2. Cladding 125 µm diameter 3. Buffer 250 µm diameter 4. Jacket 400 µm diamerter
- 3. Optical communication wavelength bands in the InfraRed: • 850 nm over Multimode fiber • 1310 nm over Singlemode fiber • C-band:1550 nm over Singlemode fiber • L-band: 1625 nm over Singlemode fiber UltraViolet InfraRed 850 nm 1310 nm 1550 nm 1625 nm l Visible Optical Spectrum
- 5. DWDM System use optical devices to combine the output/input of several optical transmitters/receivers
- 6. • One traffic channel per fiber pair • 40 x 2.5 Gbps channels, 80 fibers Traditional TDM Model STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx STM-16 TxSTM-16 Rx STM-16 Tx STM-16 Rx
- 7. Dense Wavelength Division Multiplexing DWDM • Multiple traffic channels on a fiber pair • Each channel transmitted on a different wavelength/color prevents channel interference and allows them to be separated at the receiving end • 96 x 100 Gbps channels, 2 fibers STM-16 Tx STM-16 Tx STM-16 Tx STM-16 Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx STM-16 Rx 100GE Rx STM-16 Rx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Tx 100GE Tx 100GE Tx 100GE Tx STM-16 Tx STM-16 Tx STM-16 Tx STM-16 Tx 100GE Rx STM-16 Rx 100GE Rx 100GE Rx 100GE Rx STM-16 Rx STM-16 Rx STM-16 Rx 100GE Rx 100GERx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Rx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx 100GE Tx
- 8. ITU Wavelength Grids • ITU-T l grids are based on 191.7 THz + 100 GHz or + 50 GHz • It is a standard for the channels in DWDM systems 1530.33 nm 1553.86 nm 0.80 nm 195.9 THz 193.0 THz 100 GHz 1530.33 nm 1553.86 nm 0.40 nm 195.9 THz 193.0 THz 50 GHz lWavelength Frequency 100GHz Grid 50GHz Grid lWavelength Frequency
- 9. DWDM Building Blocks OA ROAD M OA IPoDWDM IP IP OEO OEO IPoDWDM IP IP OEO OEO Optical Amplifier Optical Add/Drop DWDM Multiplexer DWDM Demultiplexer Router/Switch/SDH Grey Line Cards Transponder Transponder Router/Switch/SDH