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Chip enables coherent 40GB bandwidth

Posted: 27 May 2011 ?? ?Print Version ?Bookmark and Share

Keywords:optical networking? 40GB? high-speed internet?

PMC-Sierra Inc., manufacturer of Internet semiconductor solutions, will test later this year a system-on-chip (SoC) platform for coherent optical networking supporting high-speed Internet at 40GB.

Touted by the company as the industry's most advanced 40GB chip as of yet, PMC-Sierra said the PM6373 POLO 40G could improve the high-speed Internet deployment of phone companies.

The chipmaker positions POLO 40G as a cost-effective solution for carriers beset with the challenges brought on by the rapid rise in video and mobile data traffic. PMC-Sierra noted that the chip could be deployed on the existing fiber plant of carriers, freeing them from investing in new infrastructure.

According to PMC-Sierra, POLO 40G offers double line card density than that of the 40G non-coherent network. The use of the solution could also reduce power consumption by more than 50 percent, it added. This, as the use of the line card tuneable dispersion compensators (TCMs) is no longer required.

PMC-Sierra said the SoC architecture for the chip was a result of the combination of high-performance mixed-signal, digital signal processing (DSP), analog to digital convertor (ADC), OTN framing and Swizzle Forward Error Correction (FEC) technologies. The SoC architecture digitally compensates for optical impairments and improves optical performance by more than 2dB for an additional 25 percent fiber reach extension.

"With the explosion of bandwidth demand driving the need to upgrade existing metro, regional and long-haul fiber infrastructures to 40Gb/s and beyond, POLO 40G will be a key enabler to make the optical build-out a reality," said Daryn Lau, PMC-Sierra vice president and general manager for communication products .

Lau said POLO 40G appeals to cost-sensitive carrier Ethernet service point-to-point and metro deployments with its bandwidth per unit, power and cost proposition. According to the company, POLO 40G allows carriers to dramatically lower capital costs by eliminating widely-deployed optical equipment such as dispersion compenzation management (DCM), dispersion compensated fiber (DCF) and the extensive hands-on operational cost of tuning and managing this equipment.

Using the solution OEM line cards can transition from the present two- or three-slot implementations to single-slot. POLO 40G is a single-chip CMOS coherent DP-(D) QPSK that delivers, among others, chromatic dispersion (CD), polarization mode dispersion (PMD), second order PMD (SOP), and high-rate polarization tracking. It has a .SFI 5.1 client interface and a fully OIF-compliant line side DP-(D) QPSK interface that integrates into MSA optical modules and onto a line card with next-generation CFP2 optical modules and incorporates flash ADC technology.

Also, it supports all FEC overhead rates between seven percent and 20 percent and backward compatible with legacy 40Gb/s coherent solutions; has passed the ITU standard OTL3.4 encoding/decoding for polarization resolve and ITU standard G.709 FEC to drive broad industry interoperability; and offers an extended reach with High Gain 18.8 Percent FEC Option and increased Spectral Efficiency at 40Gb/s DP-(D)QPSK. PMC-Sierra said some of its clients will test POLO 40G later this year. The device is implemented in 40nm CMOS technology and packaged in a 480-pin 23mm x 23mm FCBGA.

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