transcievers/amplifiers for 150 km fiber run
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission. regards, Fletcher -- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
MRV Lambda Driver CWDM claims 200km with Raman amplification cards. Atrica, now owned by Nokia, Ethernet switches claim 120 km -----Original Message----- From: Fletcher Kittredge [mailto:fkittred@staff.gwi.net] Sent: Friday, October 10, 2008 11:50 AM To: nanog@nanog.org Subject: transcievers/amplifiers for 150 km fiber run We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission. regards, Fletcher -- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
MRV or Finisar are good places to look for your optics. 120km is no problem for 1G/2.7G. Depending on the qualities of your fiber 150km may be within the 120km budget. Deepak Holmes,David A wrote:
MRV Lambda Driver CWDM claims 200km with Raman amplification cards. Atrica, now owned by Nokia, Ethernet switches claim 120 km
-----Original Message----- From: Fletcher Kittredge [mailto:fkittred@staff.gwi.net] Sent: Friday, October 10, 2008 11:50 AM To: nanog@nanog.org Subject: transcievers/amplifiers for 150 km fiber run
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission.
regards, Fletcher
Thanks to all that replied. A bit more background: By regulation, the local ILEC is required to supply us with dark fiber where available. They have taken the regulatory stance that it is not technically possible to use dark fiber runs of more than 60 miles (prior, their regulatory stance was runs of more than twenty miles were not technically feasible.) Our counter-argument has been that we have existing fiber runs of 63 miles and 59 miles that work well without special equipment. We are now arguing about a particular fiber run in rural Maine of about 91 miles. Our position is it is technically feasible, depending on fiber characteristics, to light 91 miles of fiber. Their position is that runs of more than 60 miles are not feasible. I was hoping to bolster our argument by pointing to data sheets of optical transcievers rated up to 150 km. Then, after we get the fiber, I was hoping to buy said equipment. regards, Fletcher On Fri, Oct 10, 2008 at 2:50 PM, Fletcher Kittredge <fkittred@staff.gwi.net>wrote:
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission.
regards, Fletcher
-- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
-- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
These guys claim upto 180km: http://www.bookham.com/datasheets/transceivers/IGP-28111.cfm Tim:> On Fri, Oct 10, 2008 at 4:23 PM, Fletcher Kittredge <fkittred@staff.gwi.net>wrote:
Thanks to all that replied. A bit more background: By regulation, the local ILEC is required to supply us with dark fiber where available. They have taken the regulatory stance that it is not technically possible to use dark fiber runs of more than 60 miles (prior, their regulatory stance was runs of more than twenty miles were not technically feasible.) Our counter-argument has been that we have existing fiber runs of 63 miles and 59 miles that work well without special equipment. We are now arguing about a particular fiber run in rural Maine of about 91 miles. Our position is it is technically feasible, depending on fiber characteristics, to light 91 miles of fiber. Their position is that runs of more than 60 miles are not feasible. I was hoping to bolster our argument by pointing to data sheets of optical transcievers rated up to 150 km. Then, after we get the fiber, I was hoping to buy said equipment.
regards, Fletcher
On Fri, Oct 10, 2008 at 2:50 PM, Fletcher Kittredge <fkittred@staff.gwi.net>wrote:
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission.
regards, Fletcher
-- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
-- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
http://www.ipitek.com/products/broadband/ethernet.htm used by Cox and others. http://www.ipitek.com/products/subsystems/transceivers.htm Certified to 120Km, you may be able to run it further.
-----Original Message----- From: Tim Durack [mailto:tdurack@gmail.com] Sent: Friday, October 10, 2008 1:49 PM To: Fletcher Kittredge Cc: nanog@nanog.org Subject: Re: transcievers/amplifiers for 150 km fiber run
These guys claim upto 180km:
http://www.bookham.com/datasheets/transceivers/IGP-28111.cfm
Tim:>
On Fri, Oct 10, 2008 at 4:23 PM, Fletcher Kittredge <fkittred@staff.gwi.net>wrote:
Thanks to all that replied. A bit more background: By regulation, the local ILEC is required to supply us with dark fiber where available. They have taken the regulatory stance that it is not technically possible to use dark fiber runs of more than 60 miles (prior, their regulatory stance was runs of more than twenty miles were not technically feasible.) Our counter-argument has been that we have existing fiber runs of 63 miles and 59 miles that work well without special equipment. We are now arguing about a particular fiber run in rural Maine of about 91 miles. Our position is it is technically feasible, depending on fiber characteristics, to light 91 miles of fiber. Their position is that runs of more than 60 miles are not feasible. I was hoping to bolster our argument by pointing to data sheets of optical transcievers rated up to 150 km. Then, after we get the fiber, I was hoping to buy said equipment.
regards, Fletcher
On Fri, Oct 10, 2008 at 2:50 PM, Fletcher Kittredge <fkittred@staff.gwi.net>wrote:
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission.
regards, Fletcher
-- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
-- Fletcher Kittredge GWI 8 Pomerleau Street Biddeford, ME 04005-9457 207-602-1134
On Friday 10 October 2008 14:50:11 Fletcher Kittredge wrote:
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission.
EDFA's can extend your power budget a few dB. Chromatic dispersion could still be an issue, though. Used units that had previous homes in CATV supertrunk applications should work well, at least for GigE; up to 120mW is easily possible (I have a few 65mW (18.1dBm) EDFA's that came as part of a donation). You hit the input of the EDFA with your ZX (1550nm) transceiver's transmit on each end, and don't look at the lit fiber or even a reflection of the lit fiber (IOW, wear laser safety goggles). And don't even think about looping the EDFA output back around without many dB of attenuation. At this power level you will have to use angle polish connectors at the EDFA output (the green SC/SPC or FC/APC ones) or you can burn out the pump laser with the reflections. You also will need to notify your carrier's tech department of the power level with which you're lighting that fiber, as even several km down fiber from an EDFA is in Class IIIB laser territory. A bare Cisco ZX GBIC or SFP is rated to light 70km of ordinary singlemoder fiber, and up to 100km of either premium (low-loss) or dispersion-shifted (which is also low-loss) singlemode fiber. The rated output is between 0 and +5dBm (1 and 3.2 mW) for the ZX laser. The link budget is 23dB for the standard ZX optics. With a high-gain EDFA outputting 13 more dBm of power (20 times the power) you can get a link budget for loss of 36dB; which could increase your range 40km, on ordinary fiber. So, in a nutshell, you'd take the TX from a ZX SFP or GBIC, a few feet worth of jumper to an EDFA, and light the fiber (with APC connectors only) from the EDFA output. You do this at both ends.
or you buy some boxes from BTI Photonics that specialize into taking GigE around the world... F. -- François D. Ménard francois@menards.ca On 11-Oct-08, at 12:25 PM, Lamar Owen wrote:
On Friday 10 October 2008 14:50:11 Fletcher Kittredge wrote:
We are looking to light a two strand fiber link of about 95 miles (or 150km). It would be worth a lot to us not to have repeaters. We are hoping for Gigabit Ethernet. Sonet is possible but a less attractive solution. Are there options for this sort of distance? The longest current link we have is about 65 miles. I understand the transmission characteristics of the fiber will effect distance of transmission.
EDFA's can extend your power budget a few dB. Chromatic dispersion could still be an issue, though.
Used units that had previous homes in CATV supertrunk applications should work well, at least for GigE; up to 120mW is easily possible (I have a few 65mW (18.1dBm) EDFA's that came as part of a donation). You hit the input of the EDFA with your ZX (1550nm) transceiver's transmit on each end, and don't look at the lit fiber or even a reflection of the lit fiber (IOW, wear laser safety goggles). And don't even think about looping the EDFA output back around without many dB of attenuation.
At this power level you will have to use angle polish connectors at the EDFA output (the green SC/SPC or FC/APC ones) or you can burn out the pump laser with the reflections.
You also will need to notify your carrier's tech department of the power level with which you're lighting that fiber, as even several km down fiber from an EDFA is in Class IIIB laser territory.
A bare Cisco ZX GBIC or SFP is rated to light 70km of ordinary singlemoder fiber, and up to 100km of either premium (low-loss) or dispersion- shifted (which is also low-loss) singlemode fiber. The rated output is between 0 and +5dBm (1 and 3.2 mW) for the ZX laser. The link budget is 23dB for the standard ZX optics. With a high-gain EDFA outputting 13 more dBm of power (20 times the power) you can get a link budget for loss of 36dB; which could increase your range 40km, on ordinary fiber.
So, in a nutshell, you'd take the TX from a ZX SFP or GBIC, a few feet worth of jumper to an EDFA, and light the fiber (with APC connectors only) from the EDFA output. You do this at both ends.
participants (7)
-
Deepak Jain -
Fletcher Kittredge -
Francois Menard -
Holmes,David A -
Lamar Owen -
Tim Durack -
Tomas L. Byrnes