counter for iweb
Silicon Photonics

Published book, click here

Entries in coherent DSP-ASIC (10)


NeoPhotonics samples its first CFP-DCO products

NeoPhotonics has entered the fray as a supplier of long-distance CFP pluggable modules that integrate the coherent DSP-ASIC chip with the optics. 

The company has announced two such CFP Digital Coherent Optics (CFP-DCO) modules: a 100 gigabit-per-second (Gbps) module and a dual-rate 100Gbps and 200Gbps one.

“Our rationale [for entering the CFP-DCO market] is we have all the optical components and the [merchant coherent] DSPs are now becoming available,” says Ferris Lipscomb (pictured), vice president of marketing at NeoPhotonics. “It is possible to make this product without developing your own custom DSP, with all the expense that entails.”

Click to read more ...


Infinera unveils first platforms using its latest PIC & DSP  

  • The Cloud Xpress 2 platform for data centre interconnects packs 1.2 terabits in a 1 rack unit (1RU) box.  
  • Infinera has also unveiled two DTN-X XT 'meshponder' platforms that aggregate client signals and offer sliceable transponder functionality that delivers wavelengths to multiple destinations. 
  • The company also announced an open flexible grid line system that supports the C and L bands 
  • Three of the top four US internet content providers are Infinera customers.

Infinera has started to unveil its platform portfolio based on its Infinite Capacity Engine that combines the company's latest-generation photonic integrated circuit (PIC) and coherent DSP-ASIC technology.


Geoff Bennett

The first platform using the technology is the Cloud Xpress 2, Infinera second-generation data centre interconnect platform, was unveiled in September. More recently, it has added two DTN-X meshponder platforms - the XT-3300 and the XT-3600 - as well as upgrading two of its existing DTN-X platforms.

Click to read more ...


Ciena brings data analytics to optical networking 

  • Ciena's WaveLogic Ai coherent DSP-ASIC makes real-time measurements, enabling operators to analyse and adapt their networks.     
  • The DSP-ASIC supports 100-gigabit to 400-gigabit wavelengths in 50-gigabit increments. 
  • The WaveLogic Ai will be used in Ciena’s systems from 2Q 2017.  

Ciena has unveiled its latest generation coherent DSP-ASIC. The device, dubbed WaveLogic Ai, follows Ciena’s WaveLogic 3 family of coherent chips which was first announced in 2012. The Ai naming scheme reflects the company's belief that its latest chipset represents a significant advancement in coherent DSP-ASIC functionality.  

Helen XenosThe WaveLogic Ai is Ciena's first DSP-ASIC to support two baud rates, 35 gigabaud for fixed-grid optical networks and 56 gigabaud for flexible-grid ones. The design also uses advanced modulation schemes to optimise the data transmission over a given link.

Perhaps the most significant development, however, is the real-time network monitoring offered by the coherent DSP-ASIC. The data will allow operators to fine-tune transmissions to adapt to changing networking conditions. 

Click to read more ...


Enabling coherent optics down to 2km short-reach links

Silicon photonics luminaries series

Interview 5: Chris Doerr

Chris Doerr admits he was a relative latecomer to silicon photonics. But after making his first silicon photonics chip, he was hooked. Nearly a decade later and Doerr is associate vice president of integrated photonics at Acacia Communications. The company uses silicon photonics for its long-distance optical coherent transceivers.


Chris Doerr in the lab

Acacia Communications made headlines in May after completing an initial public offering (IPO), raising approximately $105 million for the company. Technology company IPOs have become a rarity and are not always successful. On its first day of trading, Acacia’s shares opened at $29 per share and closed just under $31.

Click to read more ...


OIF document aims to spur line-side innovation

The Optical Internetworking Forum (OIF) has completed defining the CFP2-ACO (analogue coherent optics) module, used for coherent-based optical transmission. The industry body's CFP2-ACO Implementation Agreement document has been developed to help optical component vendors bring innovative line-side products to market more quickly.


The CFP2-ACO. Source: OIF

The pluggable CFP2-ACO houses the coherent optics, known as the analogue front end. The components include the tuneable lasers, modulation, coherent receiver, and the associated electronics - the drivers and the trans-impedance amplifier. The Implementation Agreement also includes the CFP2-ACO's high-speed electrical interface connecting the optics to the coherent DSP chip that sits on the line card.

Click to read more ...


Coriant's 134 terabit data centre interconnect platform

Coriant is the latest optical networking equipment maker to unveil a data centre interconnect product. The company claims its Groove G30 platform is the industry’s highest capacity, most power efficient design. 

“We have several customers that have either purpose-built data centre interconnect networks or have data centre interconnect as a key application riding on top of their metro or long-haul networks,” says Jean-Charles Fahmyvice president of cloud and data centre at Coriant.


Jean-Charles Fahmy

Each card in the platform is one rack unit (1RU) high and has a total capacity of 3.2 terabit-per-second, while the full G30 rack supports 42 such cards for a total platform capacity of 134 terabits. The G30's power consumption equates to 0.45W-per-gigabit.

The card supports up to 1.6 terabit line-side capacity and up to 1.6 terabit of client side interfaces. The card can hold eight silicon photonics-based CFP2-ACO (analogue coherent optics) line-side pluggables. For the client-side optics, 16, 100 gigabit QSFP28 modules can be used or 20 QSFP+ modules that support 40 or 4x10 gigabit rates.

Click to read more ...


OFC 2015 digest: Part 1  

A survey of some of the key developments at the OFC 2015 show held recently in Los Angeles.  
Part 1: Line-side component and module developments 
  • Several vendors announced CFP2 analogue coherent optics   
  • 5x7-inch coherent MSAs: from 40 Gig submarine and ultra-long haul to 400 Gig metro  
  • Dual micro-ITLAs, dual modulators and dual ICRs as vendors prepare for 400 Gig
  • WDM-PON demonstration from ADVA Optical Networking and Oclaro 
  • More compact and modular ROADM building blocks  

Click to read more ...