40G and 100G optics options
Hi What options are available for 40G QSFP+ and 100G QSFP28 for 10+ km links? I see a lot of switches offered with QSFP+ and QSFP28. But I do not seem to find the necessary optics to build the links I want. For example, take a look at the options available at Fiberstore: https://www.fs.com/c/generic-40g-qsfp-891 Generic Compatible 40GBASE-LR4 and OTU3 QSFP+ 1310nm 10km LC Transceiver for SMF $340 Generic Compatible 40GBASE-ER4 and OTU3 QSFP+ 1310nm 40km LC Transceiver for SMF $1500 https://www.fs.com/c/generic-qsfp28-100g-transceivers-2858 Generic Compatible QSFP28 100GBASE-LR4 1310nm 10km Transceiver $1999 Generic Compatible QSFP28 100GBASE-ER4 1310nm 40km Transceiver $7000 That is it. Four modules and the 40km are prohibitive expensive. The situation at other vendors appears to be similar. I need stronger modules that can do more than 10 km without being extremely expensive. Or DWDM modules in the 1550 nm band so I can use external amplifiers. Am I looking in the wrong place? Is this expected to be available in the near future? Regards, Baldur
Have you checked out Flexoptix? https://www.flexoptix.net/en/transceiver/qsfp_ Tim On 12/18/17 9:01 AM, Baldur Norddahl wrote:
Hi
What options are available for 40G QSFP+ and 100G QSFP28 for 10+ km links?
I see a lot of switches offered with QSFP+ and QSFP28. But I do not seem to find the necessary optics to build the links I want.
For example, take a look at the options available at Fiberstore:
https://www.fs.com/c/generic-40g-qsfp-891
Generic Compatible 40GBASE-LR4 and OTU3 QSFP+ 1310nm 10km LC Transceiver for SMF $340
Generic Compatible 40GBASE-ER4 and OTU3 QSFP+ 1310nm 40km LC Transceiver for SMF $1500
https://www.fs.com/c/generic-qsfp28-100g-transceivers-2858
Generic Compatible QSFP28 100GBASE-LR4 1310nm 10km Transceiver $1999
Generic Compatible QSFP28 100GBASE-ER4 1310nm 40km Transceiver $7000
That is it. Four modules and the 40km are prohibitive expensive. The situation at other vendors appears to be similar.
I need stronger modules that can do more than 10 km without being extremely expensive. Or DWDM modules in the 1550 nm band so I can use external amplifiers. Am I looking in the wrong place? Is this expected to be available in the near future?
Regards,
Baldur
On 12/18/17 09:01, Baldur Norddahl wrote:
Hi
What options are available for 40G QSFP+ and 100G QSFP28 for 10+ km links?
I see a lot of switches offered with QSFP+ and QSFP28. But I do not seem to find the necessary optics to build the links I want.
For example, take a look at the options available at Fiberstore:
https://www.fs.com/c/generic-40g-qsfp-891
Generic Compatible 40GBASE-LR4 and OTU3 QSFP+ 1310nm 10km LC Transceiver for SMF $340
Generic Compatible 40GBASE-ER4 and OTU3 QSFP+ 1310nm 40km LC Transceiver for SMF $1500
https://www.fs.com/c/generic-qsfp28-100g-transceivers-2858
Generic Compatible QSFP28 100GBASE-LR4 1310nm 10km Transceiver $1999
Generic Compatible QSFP28 100GBASE-ER4 1310nm 40km Transceiver $7000
That is it. Four modules and the 40km are prohibitive expensive. The situation at other vendors appears to be similar.
I need stronger modules that can do more than 10 km without being extremely expensive. Or DWDM modules in the 1550 nm band so I can use external amplifiers. Am I looking in the wrong place? Is this expected to be available in the near future? qsfp28 is heavily constrained by power budget. The inability to put a serdes in the package does also very much constrain the form factor since it's 4x25 wavelengths.
cfp2-aco is the approach that stops paying for the DSP with every optic (DCO does that) gets you long haul single wave, DWDM and tunables, but it's a bit of an incovenient form-factor for fixed configuration 1ru switches.
Regards,
Baldur
This is the "failure" of us (the business) choosing QSFP as the de-factor formfactor for 100G, there is not power in that cage to make 10km+ optics in an easy way. If we would have pushed for CFP4 as the "last" formfactor in 100G land we would be much better off. The options you have to choose from realistically is QSFP28-ER4L It exist in a fec and non-fec option that does 30 and 40km respectively although a few vendors spec them at 25km cause its really hard to validate them in their upper ranges. But this is quite and expensive optic. On the horizon you have QSFP28-4WDM20 and 4WDM40 which uses FEC. Not sure where the MSA stands on that. If you need more then 30-40km reliable stuff you need to either to PAM4 (The "Inphi ColorZ" optic) which is 80km at best. These should not be confused for the regular 10G ZR-optics with a fixed lambda you can buy for $300 from china. These are dual-laser optics that runs two 50G PAM4 carriers with very low launchpower. They need pre and post-amps aswell as tuned DCM and a MUX to fully work. Also they are fixed wave so you need 44 different optics to populate a full MUX. These optics are great if you need tons of 100Gs on very short metro-spans. It always almost ends up with coherent being the better option in the end anyway if you wanna go beyond 20-25km. There is like 30 different competing products on the market now that acts as a stupid little transponder with a QSFP28 in one end (where you plug your DAC in) and a CFP2-ACO (or DCO) in the other end that let you run a couple of hundred kilometers (or thousands) with a proper coherent DWDM signal. Now that CFP2-DCO is GA finally i hope to see more linecards and switches that has CFP2 slots in them.
Hi
What options are available for 40G QSFP+ and 100G QSFP28 for 10+ km links?
I see a lot of switches offered with QSFP+ and QSFP28. But I do not seem to find the necessary optics to build the links I want.
For example, take a look at the options available at Fiberstore:
https://www.fs.com/c/generic-40g-qsfp-891
Generic Compatible 40GBASE-LR4 and OTU3 QSFP+ 1310nm 10km LC Transceiver for SMF $340
Generic Compatible 40GBASE-ER4 and OTU3 QSFP+ 1310nm 40km LC Transceiver for SMF $1500
https://www.fs.com/c/generic-qsfp28-100g-transceivers-2858
Generic Compatible QSFP28 100GBASE-LR4 1310nm 10km Transceiver $1999
Generic Compatible QSFP28 100GBASE-ER4 1310nm 40km Transceiver $7000
That is it. Four modules and the 40km are prohibitive expensive. The situation at other vendors appears to be similar.
I need stronger modules that can do more than 10 km without being extremely expensive. Or DWDM modules in the 1550 nm band so I can use external amplifiers. Am I looking in the wrong place? Is this expected to be available in the near future?
Regards,
Baldur
-- hugge
----- On Dec 18, 2017, at 9:49 AM, Fredrik Korsbäck hugge@nordu.net wrote:
This is the "failure" of us (the business) choosing QSFP as the de-factor formfactor for 100G, there is not power in that cage to make 10km+ optics in an easy way. If we would have pushed for CFP4 as the "last" formfactor in 100G land we would be much better off.
How about OSFP? The OSFP MSA has a large number of backers, including Juniper, Arista, Finisar and Google. It's the vendors that chose to go for QSFP due to the density options in a single RU chassis. Thanks, Sabri
19 dec. 2017 kl. 19:24 skrev Sabri Berisha <sabri@cluecentral.net>:
----- On Dec 18, 2017, at 9:49 AM, Fredrik Korsbäck hugge@nordu.net wrote:
This is the "failure" of us (the business) choosing QSFP as the de-factor formfactor for 100G, there is not power in that cage to make 10km+ optics in an easy way. If we would have pushed for CFP4 as the "last" formfactor in 100G land we would be much better off.
How about OSFP? The OSFP MSA has a large number of backers, including Juniper, Arista, Finisar and Google.
Yes, on OSFP we have the possbility of making this right again for 400G. It will not have the same backward compability as QSFP-DD and not the same faceplate density (but close enough i would say). But in return we would most likely see longrange optics MUCH earlier in the lifecycle of 400G
It's the vendors that chose to go for QSFP due to the density options in a single RU chassis.
Thanks,
Sabri
On 12/19/17 10:24, Sabri Berisha wrote:
----- On Dec 18, 2017, at 9:49 AM, Fredrik Korsbäck hugge@nordu.net wrote:
This is the "failure" of us (the business) choosing QSFP as the de-factor formfactor for 100G, there is not power in that cage to make 10km+ optics in an easy way. If we would have pushed for CFP4 as the "last" formfactor in 100G land we would be much better off. How about OSFP? The OSFP MSA has a large number of backers, including Juniper, Arista, Finisar and Google.
It's the vendors that chose to go for QSFP due to the density options in a single RU chassis. osfp is potentially 540W in the front panel of a 1ru switch which poses it's own engineering challenges.
Thanks,
Sabri
On Mon Dec 18, 2017 at 06:01:39PM +0100, Baldur Norddahl wrote:
What options are available for 40G QSFP+ and 100G QSFP28 for 10+ km links?
LR4 and weak ER4 (flexoptix were trying to get a 40km part out, only 25km has emerged so far) then you're into coherent stuff in a separate box (which per 100G doesn't cost a lot more than the ER4's)
I need stronger modules that can do more than 10 km without being extremely expensive. Or DWDM modules in the 1550 nm band so I can use external amplifiers.
We use 1310 amplifiers for now, originally these http://www.hubersuhner.com/en/solutions/cube-optics/products/active-systems/... but there is a fibrestore version too now https://www.fs.com/products/69350.html
Am I looking in the wrong place? Is this expected to be available in the near future?
Eventually there will be something once they can make it fit in qsfp package size and power limits. brandon
participants (6)
-
Baldur Norddahl -
Brandon Butterworth -
Fredrik Korsbäck -
joel jaeggli -
Sabri Berisha -
Tim Pozar