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31 March 2009


Opnext announces Continuously Optimized DPSK for 40Gb/s metro, regional and long/ultra- long-haul transmission

At last week’s Optical Fiber Communication Conference and Exposition and National Fiber Optic Engineers Conference (OFC/NFOEC 2009) in San Diego, Opnext announced sampling of its latest advance in 40Gb/s transmission technology, available in an industry-standard 300-pin MSA module (for volume shipment in third-quarter 2009).

Continuously Optimized - DPSK (CO-DPSK) offers what is claimed to be the industry's best performance across all applications, including metro, regional and long-haul, regardless of network configuration, network channel spacing or the number of reconfigurable optical add/drop multiplexers (ROADMs).

Opnext says that CO-DPSK further extends the capabilities of DPSK technology by continuously optimizing the communications link performance based on chromatic dispersion, nonlinear effects and real-time filtering conditions in the network. The CO-DPSK modulation scheme optimizes for all filtering conditions and provides better performance than standard DPSK, partial bit delay DPSK (P-DPSK), or Switchable FSR in 50GHz channel spacing and offers equivalent performance in the 100GHz channel spacing, the firm claims. It adds that the technology simplifies network design, improves link performance and lowers manufacturing costs and inventory management, enabling simpler, higher-volume deployment of 40Gb/s products.

“Telecom equipment vendors are introducing multi-haul DWDM flexible platforms, enabling their carrier customers to configure for different applications,” says Shri Dodani, president of Opnext’s subsystems business unit. “Opnext’s fourth-generation 40G solution CO-DPSK MSA module allows them to integrate a single DPSK module at 40Gb/s and support all of their applications without requiring manual configuration or complicated design rules, ultimately simplifying network design and lowering costs,” he adds.

“NSN’s hiT7300 and hiT7500 Optical Transport systems are designed and deployed as multi-haul systems with flexible configuration and reach in metro-regional and core network long-haul applications,” says Dr Marc Bohn, project manager Optical Components at Nokia Siemens Networks. “Technologies like Opnext’s CO-DPSK that are adaptive in nature allow us to support all these applications across different networks with a single product while simplifying sparing, enabling volume deployment, and improving overall performance,” he adds.

See related item:

Opnext to give first 16G Fiber Channel long-wave live demo

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