Single Mode Fiber

[bha77amanish]

Hi All,

What is the Transmission rate for Single Mode Fiber with 8 cores? 8 cores are divided in to 2 pairs of each.

Any help is much appreciated.

Thanks

[Tom Randstrom]

It depends upon what optoelectronics are attached to the singlemode fiber.  What is the background for your question?

The following website has some good information regarding fiber optics. 

http://fiberu.org/basic/index.html

http://www.thefoa.org/

Tom

[bha77amanish]

Hi Tom

Thanks Tom For your reply. Links are really helpful.

I am working on a desgin scenario, where 6 buildings are connected using a SIngle Mode Fiber. Each building has more then 600 users with a Gigabit connectivity to the desktop. Just confused, if a 8 core single mode fiber can meet the bandwidth requirements for each building?

Thanks

[viyuan700]

Hi Manish,

Nothing else in this world(as far as i know) can provide you more bandwidth than a Single Mode Fiber(SMF). Theoretically i think 10-15 Terabits but there are systems which works on 3-4 Terabits per sec.

One pair of SMF can give you 100Mbps or 1Terabits its just the cost electronics which connects at each end differs. The questions you have is

1. How to connect those floors/Building?Terminate each fiber at every floor or something else. Your network design will help you how to connect.

2. Your uplinks can be 1G or 10G ? Again depends on your design (600 users with Gig port to desktop doesnot means you need 600Gbps of backbone/uplink).

Maybe you need a professinal who can design it for you. You have the right fiber only matters how you implement it.

[Tom Randstrom]

SMF will allow your backbone network to scale, as viyuan700 correctly points out. 

A pair (2) of SMF fibers can be used to link two buildings with a FE, GE, 10GE or future 40G, 100G or higher speed connections (there are discussion of 400G or 1000G Ethernet). Adding wavelength division multiplexing (WDM), the 2 fibers can support multiple connections at these speeds (see the attached crude diagrams).

Being able to directly attached the equipment to the fiber is the lowest cost option because you don't need to purchase WDM filters or WDM optical transceivers.  So, depending on you bandwidth demands, your 8 fiber cores may allow you to scale your backbone without WDM.  But the option is there to add it in the future and provide you with all the bandwidth you need (just expect to pay the price for the extra layer of equipment).    

Hope this helps!