Re: booster to gain distance above 60km

[Baldur Norddahl <baldur.norddahl () gmail com>]

Sorry I forgot to read you message properly. You are saying you want 8
channels - note this will give you twice as much insertion loss compared to
two channels and might tip the balance towards requiring amplification. You
should also ask Fiberstore for advice for which channels you choose, as
there might be a huge difference in loss.

You can not amplify the single fiber. The amplifier will not tolerate a
BIDI signal. You will therefore need to amplify each channel in separate
amplifiers and that becomes very expensive.

In theory the signal could be split using an optical circulator:
http://www.fiberstore.com/c/optical-circulator_1311 and then you could
amplify either RX or TX - probably you would want to amplify RX to sidestep
issues with feedback and reflections disturbing the amplifier. I never
tried this but I am very curious if it actually works...

Regards,

Baldur



On 28 March 2015 at 20:14, Rodrigo 1telecom <rodrigo () 1telecom com br> wrote:

> Already use this bidi sfp+ to 80km from fiberstore... But i can't link two
> sides... Have -24dbi... Everything alright with  fiber... If i using this
> circuit with this signal i will have many trouble...
> I wiil buy a dwdm simplex solution from fiberstore again to use on this
> curcuit...
> What booster and preamplifier i have to use on it?!
> I will buy a 8channel simplex ... C21/c51, c22/c52 etc.... Do you know
> what a booster and an amplifier i have to buy?
>
> Enviado via iPhone 
> Grupo Connectoway
>
> Em 28/03/2015, às 13:51, Baldur Norddahl <baldur.norddahl () gmail com>
> escreveu:
>
> Hi
>
> The easy way to get 63 km is to use a SFP+ module that is rated for 63 km.
> Fiberstore has 60 km BIDI SFP+ for USD 325 and 80 km BIDI for USD 425.
>
> If you want to use a booster you would need DWDM modules instead. And you
> have to add in the DWDM splitter and two boosters. For each end of the link
> it would be USD 435 for the SFP+ module, USD 174 for the BIDI DWDM splitter
> in a rack chassis and USD 1300 for a 13 dBm output booster.
>
> So - forget about the booster and just get the 80 km BIDI modules.
>
> Regards,
>
> Baldur
>
>
>
>
> On 26 March 2015 at 13:07, Rodrigo Augusto <rodrigo () 1telecom com br>
> wrote:
>
> > Hi folksŠ we have a point and have a 63km between point A to point BŠ. We
> > have a sigle fiber ( only one fiber) and use a fiberstore sfp+ 10GB dibi
> > 1270/1330 module to connect these sites. All attenuation are okŠI don¹t
> > have
> > any trouble on fiber Š.
> > I have received this signal on my sfp+:
> >
> > Receiver signal average optical power     :  0.0026 mW / -25.85 dBm
> >
> >
> > Does anyone know if have some possible to amplifier this scenario to get
> > more 7db ? Is it possible to put any booster or any way to solve this?
> > I think to use a optical PreAmlifierŠbut I don¹t know if is possible
> > because
> > my scenario have just one fiberŠor, use a ROPA- remote optical pumping
> > amplifier) because I have 63kmŠ
> > Does anyone have some idea?
> >
> > Rodrigo Augusto
> > Gestor de T.I. Grupo Connectoway
> > http://www.connectoway.com.br <http://www.connectoway.com.br/>
> > http://www.1telecom.com.br <http://www.1telecom.com.br/>
> > * rodrigo () connectoway com br <mailto:rodrigo () connectoway com br>
> > ( (81) 3497-6060
> > ( (81) 8184-3646
> > ( INOC-DBA 52965*100