Xtera offers OTN switching capabilities
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Xtera offers OTN switching capabilities
Optical transport systems vendor Xtera Communications, Inc. has unveiled Optical Transport Network (OTN) switching capabilities. Xtera will offer the OTN switching integrated within its Nu-Wave Optima reconfigurable optical add/drop multiplexer (ROADM) or as a standalone capability.Xtera sources say the company is using the latest chip technology to create a very high capacity, hybrid packet/circuit switch fabric. The company can offer 2.4-Tbps switching capacity per shelf, which translates to 4.8 Tbps per rack. Switching capacity can be upgraded in a hitless fashion to 21.6 Tbps non-blocking using a single-stage fabric. The switch capacity can grow to 400 Tbps via a multi-stage fabric.The new capability should provide particularly useful for subwavelength grooming and other applications where converged Layer 0 WDM transport and Layer 1 OTN switching are required. The OTN switching will support efficient capacity use in backbone fiber-optic networks, robust manageability on per service and per wavelength basis, fast service provisioning, rapid failure protection, and policy-based restoration, Xtera asserts.“By introducing OTN switching to our best in class 100G and optical amplification technologies, Xtera positions itself as the supplier of choice for optical networking solutions offering capacity efficiency, resiliency, and flexibility to handle any type of services for maximizing the revenues of the service providers,” said Philippe Perrier, senior vice president, product line manager, long-haul optical transport at Xtera. “With an innovative design for the core of our OTN switch allowing a maximum switching capacity in excess of several hundreds of terabits per second, Xtera confirms again its technical leadership by introducing new technologies and industry-leading capacity and flexibility.”
Pan Dacom Direkt tests 16-Gbps DWDM transponder
WDM platform vendor Pan Dacom Direkt says it has conducted a field trial of what it asserts is the first 16-Gbps DWDM transponder. The “SPEED” 16G transponder, aimed at 16G Fibre Channel applications, was used to transmit two 16-Gbps 100-GHz channels over 40 km of singlemode fiber.
The systems connected Brocade 6510 and 300 switches in an error-free fashion, the company says.The SPEED 16G transponder modules are based on four SFP+ ports and support 4G, 8G, and 16G Fibre Channel. The system can transmit up to 40 channels at 100 GHz, which translates to 640 Gbps over one fiber pair.“Our solution enables the next generation of storage point-to-point interconnections with 16 Gbps over longer distances,” says Markus Foerster, head of product management at Pan Dacom Direkt. “We are as far as I know the first vendor in the market who has a 16-Gbps DWDM transponder solution generally available and realized the first field trial.”Pan Dacom Direkt says that “longstanding partners” have already agreed to use the new transponders to upgrade their DWDM network links to 16 Gbps for data center interconnect. “The actual architecture allows 4, 8, 10, 16 Gbps to be run simultaneously and to be upgraded to higher capacity just on demand while optimizing protection and reducing overall operating costs,” Pan Dacom quoted one unidentified customer as saying.
Skorpios demos CMOS tunable laser, nears production
Silicon photonics startup Skorpios Technologies has demonstrated the first fruits of its labors, a CMOS laser tunable across the C-Band. The demonstration signals that the company is near to delivering its first products, a milestone a company source says will occur by the end of this year.The laser leverages the Skorpios Template Assisted Bonding (STAB) process. According to Rob Stone, vice president of marketing and product management at Skorpios, STAB involves bonding a III-V epitaxial layer to a CMOS wafer. This enables creation of the laser via CMOS processes while other photonic elements are created in silicon. The finished product sees the III-V layer encapsulated within the silicon. Thus, not only does the STAB process enable light sources to be created via CMOS, but it also obviates the need for the “gold box” packaging of conventionally created lasers. The only active alignment necessary would be when connecting to fiber.Skorpios plans to target applications requiring wavelengths in the 1300- and 1550-nm regions (VCSEL-like performance at 850 nm is not compatible with the silicon photonic process, Stone says). The right III-V material for the targeted wavelength region can be applied as necessary; Stone says that products using both regions can be produced.The company’s goal is to create a library of function-based “macrocells,” similar to those in the ASIC world, via which it can create a range of both custom and MSA-based products. The macrocells likely will cover such functions as multiplexing, switching, and combining, among others. The first of the resultant “Skorpios Optical ASICs” are being developed specifically for some of the company’s initial investors, Stone says. This group includes Ericsson, Nokia Siemens Networks, Deutsche Telekom (via its venture capital firm, T-Venture), venture capitalists Cottonwood Technology Fund and Sun Mountain Capital, as well as a systems integrator and another carrier whom Stone declined to identify.Several silicon photonics firms have yet to create light sources in silicon. Stone says Skorpios has not yet pursued partnering with such companies.
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