NEC Corporation of America (NEC) and AT&T Labs have successfully demonstrated schemes for modulation and transmission of high speed optical signals at 40 Gbps and 100 Gbps data rates. The tests generated multiple wavelength-division-multiplexed (WDM) optical signals, each loaded with 114 Gbps within a 25 GHz-wide portion of the optical spectrum. This technique resulted in the highest spectral efficiency ever achieved for long-haul optical transmission. The experiment to demonstrate this transmission over 640 km of fiber was performed by NEC Laboratories America in collaboration with AT&T Labs in Middletown, New Jersey.
This work was initially described at the Optical Fiber Communication Conference and National Fiber Optic Engineers Conference, February 24-28, 2008.
In addition to the 100G spectral efficiency topic, NEC technical experts and researchers from NEC Laboratories America, Inc., in Princeton, New Jersey, and NEC Central Research Lab in Tokyo, Japan, presented 39 papers; further expanding NEC's significant contribution to the global optical networking market. Topics included:
- Optical/Wireless Integration for Enhanced Broadband Access and Transmission
- Core Network Design and Planning: Challenges and Technology Trend
- Wireless Intermediate Frequency Signal over Passive Optical Networks: Architecture and Experimental Performance Evaluation
- 40-Gb/s Wavelength-Division-Multiplexing Passive Optical Network with Centralized Lightwave Source
- Pseudowire Packet Loss Control in Optical Access
- Optical Orthogonal Frequency Division Multiple Access (OFDMA)-Based Optical Access/Metro Ring Networks
- 10-Gb/s OFDMA-PON for Delivery of Heterogeneous Services
