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| DARPA | Global Grid Communications | Budget Code: | EE-45 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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The objective of this activity is to develop and demonstrate key optical networking technologies with global reach meeting critical Department of Defense needs by leveraging over commercial network developments.
The major emphasis of this activity is on optical Wavelength Division Multiplexing (WDM) network technologies. Optical fiber has a low loss transmission window of over 30 Thz, but today's network is only utilizing about 1% of this bandwidth. The transmission of data is limited to a single wavelength carrier and switching is done electronically. This activity will investigate the issues of multiple wavelength transmission and switching in both long-distance and local-access network topologies. To the extent possible, optical switching will be used to replace electronic switching to investigate the advantages of data-rate, format and protocol transparency. This activity supports device development, architecture, network control and management, testbeds and field trials. A small part of this activity will investigate the technologies of ultra-fast optical Time-Division-Multiplexing. All-optical technologies will be emphasized, which includes switching, storage, logic gate, and switching and synchronization. The pulse width is in the picosecond range and the bandwidth is over 100 gigabits per second. These pulses are usually transmitted as solitons to eliminate the dispersive effect in optical fibers. |
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| Milestone Changes | FY 97 milestone delete: integration with advanced optical testbeds; large scale planning demonstrations; and deployable JTF C3. Changed budget from HECC to LSN | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| FY 1995 Actual Milestones | FY 1996 Estimated Milestones | FY 1997 Agency Requested Milestones | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Demonstrated liquid-crystal cross-connect for high speed data routing.
Demonstrated network access module: 8 wavelengths, 2.5 Gb/s per channel, that performs transmit, receive, add/drop, multiplex and demultiplex functions. Demonstrated amplifier gain equalization with multiple wavelengths. Completed long-distance WDM network architecture analysis. Completed candidate architecture for local exchange WDM network. Completed initial phase of fiber link installation at ATDnet. Completed target signaling parameters for WDM optical networks. Demonstrated tunable receiver operation for a 32 wavelength transceiver set. Demonstrated 100 Gb/s, 375-km soliton transmission. |
Demonstrate a WDM testbed at the San Francisco Bay area.
Demonstrate 50 Gb/s optical buffer. Demonstrate initial operation of 40 Gb/s cross-connect switch. Complete local exchange traffic analysis. Demonstrate WDM SONET/ATM self-protection ring network. Complete phase I of network control & management software of local exchange network. Demonstrate 32 wavelength tunable transmitter. Demonstrate WDM ring network at San Francisco Bay area. |
Finalize network control and management strategy of WDM network.
Demonstrate WDM field trial at ATDnet. Demonstrate final phase field trial at San Francisco Bay area. |
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