Julia Y. Larikova

Engineering 400G for colorless-directionless-contentionless architecture in metro/regional networks [invited]

Metro/regional networks are beginning the transition from 10 to 100 Gb/s on dispersion unmanaged optical links. Long-haul networks have a head start in the move to all-coherent networking and have popularized route-and-select-based node designs and colorless, directionless, and contentionless add/drop structures. Both metro and long-haul coherent networks are expected to support future 400 Gb/s transmission. This paper examines the node architecture and 400G transmission options for coherent metro networks with the distinctive characteristics of short spans and high optical filtering penalties. Reach results are derived for signals based on 100, 200, and 400 Gb/s superchannels. Additionally, blocking probabilities are reported for two approaches to nodal add/drop architecture. The results provide a clear direction for metro/regional node and network architecture decisions.

Measuring the Optical Signal-to-Noise Ratio in Agile Optical Networks

We have proposed an improved OSNR measurement technique called optical polarization splitting based on the polarization-nulling method. The test results with Tellabs ultra high speed networks showed that the proposed technique could measure the OSNR accurately at all modulation formats even when the signal was significantly depolarized due to PMD and nonlinear birefringence.

Contentionless and near contentionless blocking performance and economics for all coherent metro/regional networks

Architectural alternatives are considered for networks carrying all coherent transmission. Blocking and network economics are modeled for four high potential add/drop structures and the results provide clear direction for nodal architectural decisions.

Engineering 400G in metro/regional networks

Network and nodal architectural alternatives are considered for 400G+ transmission based on 100Gb/s and 200Gb/s subchannels in super-band transmission. Reach results are derived for practical metro/regional networks. The results provide clear direction for architectural decisions.

PDL impairment on 40 and 100G pol-mux transmission

Polarization multiplexing is a key technology for 40 and 100G transmission. This paper determines pol-mux penalties from polarization dependent loss and shows how the choice of transmission format can improve PDL related penalties.