INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

LED vs. Laser Light Source / OM4 Multi Mode Fiber Optic Cable Attenuation

LED vs. Laser Light Source / OM4 Multi Mode Fiber Optic Cable Attenuation

(OP)
I have an application involving a 1,200 foot run of OM4 laser optimized 50/125 um multi mode fiber optic cable. I have a new device that needs to communicate over this fiber link, but it only comes with a LED light source. Specs for new device are:

Light Source: LED
Data Rate: 100 Mbps
Wavelength: 1300 nm
Multimode: 62.5 um
Optical Budget: 11 dBm
Max. Distance: 2 km

Since I will be using 50 um multi mode cable with a LED light source, how do I determine the maximum distance based on above specs?

I have attenuation data for both 50/125 and 62.5/125 um multi mode cable, but I cannot figure out detailed impact of using LED vs. Laser light source.

RE: LED vs. Laser Light Source / OM4 Multi Mode Fiber Optic Cable Attenuation

Not sure what the issue is. You have a 1200 ft run and a source capable of driving 2 km, which is 6561 ft, so you would seem to have plenty of margin.

TTFN
FAQ731-376: Eng-Tips.com Forum Policies
[IMG http://tinyurl.com/7ofakss]
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers


Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com: http://www.engineering.com/AskForum/aff/32.aspx

RE: LED vs. Laser Light Source / OM4 Multi Mode Fiber Optic Cable Attenuation

OM4 is a higher quality fiber and is backwards compatible to lower LED bandwidth cables (OM1 & OM2) so you should not have any problems with using OM4 fiber. Corning recommends the use of OM3 or OM4 (50u) for all legacy systems so you should be fine. But, to be sure you should contact the manufacturer of the device and confirm with them.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close