Re: [802.3_100GNGOPTX] Next Generaton 100 Gbs/ PMD technology alternative commentary
Hi Chris
I am just saying the word of caution keeping in mind that a) Nature Photonics is anything but an industry journal b) Commentary in Nature Photonics is not going through the rigorous reviewing scrutiny as regular papers c) The authors are mostly representing academia or academia-like institutions or organizations (with a single exception of Luxtera engineer) . As such, this Opinion paper should be taken with caution. Even the same authors in different circumstances, for example representing a view of a company at the industrial forum, will be most likely giving different messages.
The main disagreement is in consideration of the cost efficiency - the most important topic for this Study group. Silicon photonics in the foundry does not necessarily require up-front infrastructure investment. the manufacturing cost is not necessarily directly related to the foundry volumes and, most importantly, the cost of the final product is not necessarily defined by the cost of silicon photonics piece of it. I would be very curious, by the way, to hear real cost estimates from Luxtera, but I suspect that this will remain in my wish list for some time. My opinion on cost topic I tried to express in the IEEE magazine Feb issue and in the presentation I gave at the last Plenary meeting.
Saying that I agree in general with the view on on-chip optics as a very far away perspective, on packaging as the major challenge, and on the idea that integration with the most advanced CMOS node is not an advantage.
Yurii
______________________________________
Dr. Yurii A. Vlasov, Manager
Silicon Integrated Nanophotonics | tel: (914)945-2028
IBM TJ Watson Research Center | fax: (914) 945-2141
1101 Kitchawan Rd, PO box 218 | email:yvlasov@xxxxxxxxxx
Yorktown Heights, NY 10598 | http://www.research.ibm.com/photonics
"Chris Cole" ---04/19/2012 07:43:41 PM---Hi Yuri, There are many perspectives on Si Photonics, which is as expected since we are dealing wit
From: "Chris Cole" <chris.cole@xxxxxxxxxxx>
To: Yurii Vlasov/Watson/IBM@IBMUS
Cc: <STDS-802-3-100GNGOPTX@xxxxxxxxxxxxxxxxx>
Date: 04/19/2012 07:43 PM
Subject: RE: [802.3_100GNGOPTX] Next Generaton 100 Gbs/ PMD technology alternative commentary
Hi Yuri,
There are many perspectives on Si Photonics, which is as expected since we are dealing with a new field.
Since you have found assumptions and conclusions in the Commentary that you disagree with you, you may consider presenting the details of why you disagree rather than simply dismissing them as wrong and naïve.
I am also not sure why you are contrasting the Commentary with what “… is being developed in the industry.” Three of the co-authors were or are associated with Luxtera which is shipping Si Photonics based optical cables. One co-author is with IME ASTAR which jointly with LightWire developed novel Si modulator technology. The other two authors have lengthy experience with research and operations in semiconductor processes. I don’t see these authors as just offering an academic viewpoint. On the contrary, they are offering needed caution based on an understanding of the limitations of a nascent industry so that the long term commercial potential is not jeopardized through overpromises.
Chris
From: Yurii Vlasov [mailto:yvlasov@xxxxxxxxxx]
Sent: Thursday, April 19, 2012 4:01 PM
To: Chris Cole
Cc: STDS-802-3-100GNGOPTX@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_100GNGOPTX] Next Generaton 100 Gbs/ PMD technology alternative commentary
Chris
It is indeed an interesting article. Just a word of caution - it is written from the academia angle, and, to my opinion, does not really analyze the advantages and disadvantages of silicon photonics as it is being developed in the industry. Some of the conclusions are wrong since they are based on wrong assumptions, and some are just naive. I do not think it can be used for this study group as a basis to assess silicon photonics as a technology for next gen 100Gb/s.
Yurii
______________________________________
Dr. Yurii A. Vlasov, Manager
Silicon Integrated Nanophotonics | tel: (914)945-2028
IBM TJ Watson Research Center | fax: (914) 945-2141
1101 Kitchawan Rd, PO box 218 | email:yvlasov@xxxxxxxxxx
Yorktown Heights, NY 10598 | http://www.research.ibm.com/photonics
Chris Cole ---04/19/2012 05:57:37 PM---Dear 802.3 Next Generation 100 Gb/s Optical Ethernet Study Group participants,
From: Chris Cole <chris.cole@xxxxxxxxxxx>
To: STDS-802-3-100GNGOPTX@xxxxxxxxxxxxxxxxx
Date: 04/19/2012 05:57 PM
Subject: [802.3_100GNGOPTX] Next Generaton 100 Gbs/ PMD technology alternative commentary
Dear 802.3 Next Generation 100 Gb/s Optical Ethernet Study Group participants,
New technologies have been discussed in the Study Group, with the promise of enabling lower cost and lower power 100 Gb/s PMDs.
A recent Commentary in Nature Photonics gives an insightful perspective on one of these new technologies: Si Photonics. The lead author is Michael Hochberg co-founder of Luxtera and now a Professor at the University of Washington researching Si Photonics. His co-authors are leading researchers and engineers in the field of Si Photonics. The article achieves a good balance between identifying near term limitations and long term promise.
Nature Photonics is a by subscription publication. However, the Nature Publishing Group has generously made the Commentary available free of charge to 802.3 NG 100G OE Study Group members to support investigation of 100 Gb/s PMD technology alternatives.
The Commentary will be placed on the below web site for use by 802.3 participants only, in support of Next Generation 100 Gb/s PMD definition efforts.
ftp://ftp.finisar.com/
user: ieee
pwd: ieee8023
file: Hochberg_NP_2012.pdf
The Commentary is not to be used for any commercial purposes.
Since this email references an external ftp site, which is not considered archival grade by 802.3, it will be removed from the 802.3 email reflector archives after a period of time, as per established precedence.
Thank you
Chris