Jeremy, SmartOptics is one such vendor that I've used in the past that may be able to do this.
http://www.smartoptics.com/ -Josh On Tue, Dec 27, 2016 at 10:41 AM, Brian R <briansupp...@hotmail.com> wrote: > I have to agree with Brandon. I have not worked with Ciena equipment > directly but have work with carriers that use it. I worked with Adtran on > this kind of setup and like Brandon said they require a lot of information > to build what is needed for each specific run (fiber type, quality, wave > length optimization, number of splices, etc). I've seen the tools Adtran > uses to calculate exactly what equipment is required and it is pretty > complex for distances even close to what you are talking about. > > Definitely check for a re-gen site(s), most likely the carrier has to > re-gen their own runs down this fiber path (another thing to consider in > the calculation matrix especially if you are not trying to re-gen your run). > > > I have to give Baldur kudos for finding that I'm still amazed that > Fiberstore is claiming that's possible without a lot of information. I > have worked with Fiberstore and they are a cooperative vendor and their > products work for what we have used them for. > > > My suggestion is to reach out to Fiberstore, Ciena, Adtran, and other > vendors that people recommend with a detailed email of what you would like > to accomplish and the information you can get. Ask for a design engineer > (I know Adtran has them and assume others do) to get the info you need and > see what they can mock up for you. > > > Brian > > > ________________________________ > From: NANOG <nanog-boun...@nanog.org> on behalf of Brandon Martin < > lists.na...@monmotha.net> > Sent: Sunday, December 25, 2016 12:41 AM > To: nanog@nanog.org > Subject: Re: DWDM on 250 Km dark fiber without re-amplification > > On 12/23/2016 07:14 PM, Jeremy wrote: > > Hi all, > > > > First, i'm sorry for my english, i'm french and i don't have a good > > level in this language. But i want some informations and i'm sure, > > someone will be give the good anwser about my question. > > > > So, i'm regarding to rent a dual dark fiber in France, the estimated > > distance is 225 Km, but i know there are a lot of optical switching on > > the highway where it's fiber is installed (in theory, all 80 Km). So, i > > used the bad scenario, in adding 25 Km on my need. > > > > I would like to buy a amplificator and multiplexer DWDM to add some > > 10Gb/s waves on this dark fiber. I've see that the amplification is > > better on 100 Gb/s synchronised ports, but we don't have enoug capacity > > on our router to add 100 Gb/s interfaces. > > > > So, someone has installed this type of hardware on a dark fiber without > > regeneration on 250 Km of distance ? > > If yes, with what kind of hardware ? If you are commercial for this > > hardware, please contact me in private message. > > > Look up Raman amplification. The short of what this does is it pumps a > ton of power into the near end of the fiber span and creates what looks > somewhat like a typical color-blind amplifier somewhere several dozen km > out on the span. You'll also need to dump a ton of power into the span > at the far end using an EDFA or similar. Even with both of those, that > distance is still going to push the raw optical power budget of even > most state-of-the-art transceivers especially if the fiber is old or of > low quality (high loss, high dispersion, etc.). > > The longest span I've ever gotten a vendor to commit to an engineered > design for was about 140km, and of course they needed full > characterization of the span before they'd do it. At those distances, > distance alone is no longer sufficient to throw together a design. > > It seems highly likely that there's at least one re-gen facility along > that span. I'd definitely see if there is one and if you can get some > space in it. That will knock you down into the 100-130km range on both > sides of the re-gen, hopefully, which is perfectly doable. > > You are somewhat correct that 100Gb interfaces often handle longer > distances better, but it's because they are often using coherent > receivers and carrier-synchronous transmitters rather than raw power > receivers and ASK pulsed transmitters. There are vendors that sell > coherent 10Gb transceivers, too, and they'll be cheaper than 100Gb > solutions especially if you don't need the extra capacity anyway. I'd > definitely check them out for this type of application especially if you > can't get any dispersion compensation in the middle since coherent > optics are usually much more tolerant of chromatic dispersion. > > The big vendor I've worked with in the past on this sort of stuff is > Ciena (and they're certainly a juggernaut in the industry) though I have > no connection to them other than as a satisfied (if occasionally broke > after a PO or out of breath after seeing a quotation) customer/integrator. > > -- > Brandon Martin >
