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SimonParry
SimonParry
12/5/2012 | 5:42:21 PM
re: Dutch Exchange Rolling Its Own 100G


"which is awesome because we get to mention praseodymium for the first time ever on Light Reading."


As opposed to when you mentioned it in 2002: http://www.lightreading.com/do...

DCITDave
DCITDave
12/5/2012 | 5:42:19 PM
re: Dutch Exchange Rolling Its Own 100G


Thanks. Good to see our search engine is working.

Pete Baldwin
Pete Baldwin
12/5/2012 | 5:42:19 PM
re: Dutch Exchange Rolling Its Own 100G


Nope, I saw that one, and it doesn't count!  It's got the acronym but doesn't name the element!

Duh!
Duh!
12/5/2012 | 5:42:17 PM
re: Dutch Exchange Rolling Its Own 100G


We had 1310nm and 1490nm SOAs from at least three different vendors in our lab 3 or 4 years ago.     Did they say why they needed to have these devices custom fabricated?

BigBro
BigBro
12/5/2012 | 5:42:17 PM
re: Dutch Exchange Rolling Its Own 100G


All these 100GBASE-xR4 standards run 4 links at 25Gbps in parallel, so each link can have different jitter, etc.


Is extending the range really as simple as just juicing up the signal? Does amplifying it not introduce additional jitter, which, if different between the lanes, could be a big deal?

Pete Baldwin
Pete Baldwin
12/5/2012 | 5:42:15 PM
re: Dutch Exchange Rolling Its Own 100G


> Is extending the range really as simple as just juicing up the signal? Does amplifying it not introduce additional jitter, which, if different between the lanes, could be a big deal?


I would think it does. Then again, AMS-IX might not need all 40km, so maybe the solution doesn't have to be perfect...?


The setup would also be clunkier than a module by definition (i.e., bigger, you have to go through the trouble of makingit, etc...). Pels made it sound like they'd be happy to do things this way as long as it's cheaper than an ER4, but that might just be posturing on his part.

Pete Baldwin
Pete Baldwin
12/5/2012 | 5:42:15 PM
re: Dutch Exchange Rolling Its Own 100G


You know, that kind of puzzled me too, after the fact. I should go back and ask.

^Eagle^
^Eagle^
12/5/2012 | 5:42:14 PM
re: Dutch Exchange Rolling Its Own 100G


actually if you use a properly designed SOA, you do not introduce any additional jitter.  For the SOA it is a question of where on it's operating curve you run it.  How close to PSAT is it?


if the SOA has enough gain, and correct threshold, and enough Pout, then it should be a nice solution.  You want to stay in the iinear regime for the SOA and not run it at saturation (counter to what you normally do with an EDFA or PDFA)


But I agree with the post.  There are several companies making off the shelf SOA's that are fully packaged.


We did an experiement with 16 and 32 streams of 10gig going through an SOA back in 2002 / 2003.


2x25 should relatively straightforward.  


sailboat



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