Subject: Is there any heat dissipation along a fiber optic cable?

I was under the impression that typically pulses of infrared light are used 
to pass information through fiber optic cables.  I was also under the 
impression that infrared light is also known as heat radiation.  If that is 
the case, is there any heat dissipation along the fiber optic cable?  If 
not, why not?  If the cable is not designed properly (i.e. diameter, 
material, cladding, etc.), would there be dissipation of heat radiation 
along the fiber optic cable?  Any additional information would be greatly 
appreciated.  Thank you.

Re: Is there any heat dissipation along a fiber optic cable?