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The 400MB/s FC-AL standard offers 2Gbps over 70m of multimode fiber (62.5µm) according to Fibre Channel. Additionally, there are two popular types of multimode fiber: 62.5µm and 50µm. These measures indicate the size of the fiber's core. These two core sizes have slightly different attenuation properties and generally should not be mixed (which causes greater attenuation). Both sizes of multimode fiber are recognized in the standards for Ethernet (IEEE 802.3), Fibre Channel, ATM, FDDI, and Token Ring (among others).—Preceding unsigned comment added by 208.20.220.72 ( talk • contribs) 10:40, February 1, 2006
The references about the market analysis thing need removing and putting in a footnote :) Arghlookamonkey 20:22, 28 October 2007 (UTC)
According to research conducted by Matthew O. Burroughs (www.marketsharetrends.com) the predominant multi-mode fiber deployed today is still legacy 62.5/125 µm multi-mode fiber, although 50/125 µm fiber, including all bandwidths, is expected to surpass 62.5/125 µm by the end of 2007. Of the 50/125 µm fiber being deployed today, slightly more than half is...
As the multi-mode fiber can accomated multiple modes. does this mean that multiple signals can be passed at the same time. if so how many channels? this point is missing in the article Ap aravind ( talk) 10:45, 13 February 2010 (UTC)
I'm not convinced there exists an LED modulation limit at a specific data rate. I have looked through the internet and the references given, and the earliest mention I can find of this number is this paper:
Knobloch, A.; Kiesel, P.; Dohler, G.H.; Windisch, R.; Dutta, B.; Borghs, G.; Heremans, P.; , "Modulation Behaviour of Highly Efficient Non-Resonant Cavity Light-Emitting Diodes," Solid-State Device Research Conference, 1999. Proceeding of the 29th European , vol.1, no., pp. 520- 523, 13-15 September 1999
doi: 10.1109/ESSDERC.1999.195136
They do not say it is a maximum limit, they just say they have achieved it.
I want to change the sentence "LEDs have a maximum modulation rate of 622 Mbit/s because they can not be turned on/off fast enough to support higher bandwidth applications." (which is lifted straight from the 1st reference) to something like "LEDs have a maximum modulation rate because they cannot be modulated fast enough to support higher bandwidth applications - they begin to act capacitatively".
Can anyone find a (peer-reviewed) reference that supports 622MBits/sec - there's a fair few "white papers" etc on the internet which mention it, but not why.
Toomuchrockcankill (
talk)
17:05, 13 January 2011 (UTC)
Thank you to whomever followed up on my edit last night regarding jacket colors. I was having trouble following it myself, and modified the article the best I could, but the current version is even better!
198.152.13.67 ( talk · contribs) made some technical changes. The edit comment cited IEEE 802.3-2012 which appears to be a new ref. I believe the previous numbers were correct for previous versions of the standard. I have reverted the changes until someone can add the citation and verify. ---— Kvng 14:08, 10 November 2012 (UTC)
We use MultiMode OM1 with 1Gbps speed on 2000M using Mode Conditioning. Should this be mentioned in this article? I don't have references on hand 198.161.238.19 ( talk) 23:37, 14 March 2013 (UTC)
How about a section that describes exactly what multimode fibre actually is? As it stands, the article only describes what it isn't; in other words, how it differs from single mode fibre. Reading the article on single mode fibre isn't exactly enlightening, either. 81.136.202.93 ( talk) 15:10, 18 September 2013 (UTC)
There is some inconsistent usage re: spelling - multimode vs. multi-mode. I have a sense that the former is probably the correct form, but I can't find what I would call the authoritative reference. If anyone knows, please point it out. — Preceding unsigned comment added by 12.177.68.254 ( talk) 01:03, 27 May 2015 (UTC)
The TIA-568.3-D standard uses "multimode" and "single-mode." This is a standard that must be purchased to view, hovever. RockyGNgoat ( talk) 20:59, 4 July 2022 (UTC)
OM5 is currently in the tentative stage, but most specs are set in place (see TIA TIA-492AAAE). Should it be added to the table or wait until officially out? Bdh008 ( talk) 15:39, 23 March 2017 (UTC)
The computer industry brings out new specs to keep pricing elevated. OM5 fiber is in the talking stage and does not exist yet nor is it needed. OM3 and OM4 multimode fiber have been out for some time. There is little or no difference in the fiber, both are capable of 10GB and going the speed of light which we have not been able to achieve. So there is really no need for OM5. While OM3 cables (50U) have a place OM4 with barely a difference have not sold well. Typically OM3 & OM4 are aqua in color. OM1 is orange. For most applications OM1 is more than adequate. Just be aware OM1 can be 62.5/125 or 50U. While equipment requiring 62.5 can usually accept 50U the reverse is not true. The best thing is to buy from a place that can help you choose the right fiber.
Getting the right fiber is the 1st step. A lot has been written about obtaining gigabyte with copper cables cables and while it may on the surface seem like a less expensive alternative, the speed is obtained by the hardware not the cable. With fiber the equipment has not caught up to the cable which means that the fiber cable is far ahead of any speeds available through hardware. So if you choose the fiber route you are easily 25yrs ahead of any advancements in the hardware. This makes the fiber choice a less expensive alternative and a good insurance policy against any potential advancements and having to replace cable.
OM1 can do 10 Gbps w/LRM optics? — Preceding unsigned comment added by 66.192.207.194 ( talk) 15:06, 28 June 2017 (UTC)
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The 400MB/s FC-AL standard offers 2Gbps over 70m of multimode fiber (62.5µm) according to Fibre Channel. Additionally, there are two popular types of multimode fiber: 62.5µm and 50µm. These measures indicate the size of the fiber's core. These two core sizes have slightly different attenuation properties and generally should not be mixed (which causes greater attenuation). Both sizes of multimode fiber are recognized in the standards for Ethernet (IEEE 802.3), Fibre Channel, ATM, FDDI, and Token Ring (among others).—Preceding unsigned comment added by 208.20.220.72 ( talk • contribs) 10:40, February 1, 2006
The references about the market analysis thing need removing and putting in a footnote :) Arghlookamonkey 20:22, 28 October 2007 (UTC)
According to research conducted by Matthew O. Burroughs (www.marketsharetrends.com) the predominant multi-mode fiber deployed today is still legacy 62.5/125 µm multi-mode fiber, although 50/125 µm fiber, including all bandwidths, is expected to surpass 62.5/125 µm by the end of 2007. Of the 50/125 µm fiber being deployed today, slightly more than half is...
As the multi-mode fiber can accomated multiple modes. does this mean that multiple signals can be passed at the same time. if so how many channels? this point is missing in the article Ap aravind ( talk) 10:45, 13 February 2010 (UTC)
I'm not convinced there exists an LED modulation limit at a specific data rate. I have looked through the internet and the references given, and the earliest mention I can find of this number is this paper:
Knobloch, A.; Kiesel, P.; Dohler, G.H.; Windisch, R.; Dutta, B.; Borghs, G.; Heremans, P.; , "Modulation Behaviour of Highly Efficient Non-Resonant Cavity Light-Emitting Diodes," Solid-State Device Research Conference, 1999. Proceeding of the 29th European , vol.1, no., pp. 520- 523, 13-15 September 1999
doi: 10.1109/ESSDERC.1999.195136
They do not say it is a maximum limit, they just say they have achieved it.
I want to change the sentence "LEDs have a maximum modulation rate of 622 Mbit/s because they can not be turned on/off fast enough to support higher bandwidth applications." (which is lifted straight from the 1st reference) to something like "LEDs have a maximum modulation rate because they cannot be modulated fast enough to support higher bandwidth applications - they begin to act capacitatively".
Can anyone find a (peer-reviewed) reference that supports 622MBits/sec - there's a fair few "white papers" etc on the internet which mention it, but not why.
Toomuchrockcankill (
talk)
17:05, 13 January 2011 (UTC)
Thank you to whomever followed up on my edit last night regarding jacket colors. I was having trouble following it myself, and modified the article the best I could, but the current version is even better!
198.152.13.67 ( talk · contribs) made some technical changes. The edit comment cited IEEE 802.3-2012 which appears to be a new ref. I believe the previous numbers were correct for previous versions of the standard. I have reverted the changes until someone can add the citation and verify. ---— Kvng 14:08, 10 November 2012 (UTC)
We use MultiMode OM1 with 1Gbps speed on 2000M using Mode Conditioning. Should this be mentioned in this article? I don't have references on hand 198.161.238.19 ( talk) 23:37, 14 March 2013 (UTC)
How about a section that describes exactly what multimode fibre actually is? As it stands, the article only describes what it isn't; in other words, how it differs from single mode fibre. Reading the article on single mode fibre isn't exactly enlightening, either. 81.136.202.93 ( talk) 15:10, 18 September 2013 (UTC)
There is some inconsistent usage re: spelling - multimode vs. multi-mode. I have a sense that the former is probably the correct form, but I can't find what I would call the authoritative reference. If anyone knows, please point it out. — Preceding unsigned comment added by 12.177.68.254 ( talk) 01:03, 27 May 2015 (UTC)
The TIA-568.3-D standard uses "multimode" and "single-mode." This is a standard that must be purchased to view, hovever. RockyGNgoat ( talk) 20:59, 4 July 2022 (UTC)
OM5 is currently in the tentative stage, but most specs are set in place (see TIA TIA-492AAAE). Should it be added to the table or wait until officially out? Bdh008 ( talk) 15:39, 23 March 2017 (UTC)
The computer industry brings out new specs to keep pricing elevated. OM5 fiber is in the talking stage and does not exist yet nor is it needed. OM3 and OM4 multimode fiber have been out for some time. There is little or no difference in the fiber, both are capable of 10GB and going the speed of light which we have not been able to achieve. So there is really no need for OM5. While OM3 cables (50U) have a place OM4 with barely a difference have not sold well. Typically OM3 & OM4 are aqua in color. OM1 is orange. For most applications OM1 is more than adequate. Just be aware OM1 can be 62.5/125 or 50U. While equipment requiring 62.5 can usually accept 50U the reverse is not true. The best thing is to buy from a place that can help you choose the right fiber.
Getting the right fiber is the 1st step. A lot has been written about obtaining gigabyte with copper cables cables and while it may on the surface seem like a less expensive alternative, the speed is obtained by the hardware not the cable. With fiber the equipment has not caught up to the cable which means that the fiber cable is far ahead of any speeds available through hardware. So if you choose the fiber route you are easily 25yrs ahead of any advancements in the hardware. This makes the fiber choice a less expensive alternative and a good insurance policy against any potential advancements and having to replace cable.
OM1 can do 10 Gbps w/LRM optics? — Preceding unsigned comment added by 66.192.207.194 ( talk) 15:06, 28 June 2017 (UTC)
Hello fellow Wikipedians,
I have just modified 2 external links on Multi-mode optical fiber. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 02:14, 8 February 2018 (UTC)