Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 2
docdivakar
User Rank
Manager
re: Cisco packs silicon photonics on 3-D ICs
docdivakar   1/29/2013 7:27:17 PM
NO RATINGS
Rick, the title is somewhat misleading... I think Mr. Swift was referring to planar Si optical waveguides. Using these in 3D optical interconnect, from today's on-chip optical interconnect technology, is still far away from fruition from a practical view point. Last year's DesignCon I think there was a talk by HP Lab's chief about this but it has remained largely as a research project. There is no doubt that this is the next growth area for transistors. Underwhelming SDN/OpenFlow by Cisco is not surprising because it is a disruptor to their legacy products! For those interested, here is the link to presentations from Silicon Valley Comsoc on SDN's by Guru Parulkar & Dan Pitt of Open Networking Research Center: http://ewh.ieee.org/r6/scv/comsoc/ComSoc_2012_Presentations.php MP Divakar

a.sun
User Rank
Rookie
re: Cisco packs silicon photonics on 3-D ICs
a.sun   1/29/2013 7:25:23 PM
NO RATINGS
The laser is made of InP by bonding a 2-4" InP wafer onto a 6-8" Si wafer (the size mismatch is an issue!) and thinning down the InP wafer to a few micrometers for later planar processing steps. As far as I know, Intel's solution uses separate CMOS TIA & laser driver chips in addition to a Si photonics chip (including functions of photo detection, modulation and optical routing) in comparison to a more integrated solution from Luxtera.

a.sun
User Rank
Rookie
re: Cisco packs silicon photonics on 3-D ICs
a.sun   1/29/2013 7:24:35 PM
NO RATINGS
The laser is made of InP by bonding a 2-4" InP wafer onto a 6-8" Si wafer (the size mismatch is an issue!) and thinning down the InP wafer to a few micrometers for later planar processing steps. As far as I know, Intel's solution uses separate CMOS TIA & laser driver chips in addition to a Si photonics chip (including functions of photo detection, modulation and optical routing) in comparison to a more integrated solution from Luxtera.

HS_SemiPro
User Rank
CEO
re: Cisco packs silicon photonics on 3-D ICs
HS_SemiPro   1/29/2013 6:37:11 AM
NO RATINGS
That's the beauty of 2.5D and full 3D designs, greatly reduce system cost improve signal latency

rick merritt
User Rank
Author
re: Cisco packs silicon photonics on 3-D ICs
rick merritt   1/29/2013 6:07:37 AM
NO RATINGS
But not as much resistance as an off-chip design ;-)

resistion
User Rank
CEO
re: Cisco packs silicon photonics on 3-D ICs
resistion   1/29/2013 4:13:20 AM
NO RATINGS
The lasers are still non-Si; they are probably InP or the like at the very least. So it looks like interposers will replace motherboards? That's pretty disruptive. Expect some resistance.

<<   <   Page 2 / 2


EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Steve Wozniak Reacts to Latest iPhone
Max Maxfield
15 comments
Funnily enough, just a few days ago as I pen these words, I was chatting with my wife (Gina the Gorgeous) when she informed me that -- as a kid -- she had never played at making a ...

EDN Staff

11 Summer Vacation Spots for Engineers
EDN Staff
20 comments
This collection of places from technology history, museums, and modern marvels is a roadmap for an engineering adventure that will take you around the world. Here are just a few spots ...

Glen Chenier

Engineers Solve Analog/Digital Problem, Invent Creative Expletives
Glen Chenier
15 comments
- An analog engineer and a digital engineer join forces, use their respective skills, and pull a few bunnies out of a hat to troubleshoot a system with which they are completely ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
46 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)