Topband: Group delay distortion in receiver filters

[Joe Tik Mok]

Hi there,

I'm a research student in the field of optics. Recently I'm studying the 
effect of group delay ripple/phase distortion on an optical pulse. I wonder 
if there's such an analogy in the electrical signal processing? It seems to 
me that this is actually rather thoroughly understood in signal processing 
but not in the optics.

P.S. I'm looking along this line: group delay ripple causes phase disortion 
and crates echo pulses.

Thanks, Joe