Interference between different mode of light

AI Thread Summary
Two different light modes focused on a single spot can theoretically interfere, though practical applications may lead to distortion. The discussion centers on combining different wavelengths of light in fiber optic cables and the challenges associated with separating them using gratings. Clarification is sought on the term "different light modes," with some participants interpreting it as referring to multimode fiber. It is confirmed that different modes can indeed interfere with each other. Understanding the mechanisms behind this interference remains a topic of interest.
watertreader
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Hi,

If I have two different light modes focused onto a single spot, could they interfere?

Thanks
 
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Theoretically I think the answer is no, practically, they could. I'm just studying how different wavelengths of light are combined and sent down a single fibre optic cable, then split using gratings at the other end into separate wavelengths again. This is allowed but there is some distortion associated with the method. I don't know the details of the mechanisms though.
 
What do you mean by "different light modes?"
 
hi,

I am thinking of mode as in the mode in fiber...specifically toying around the idea of a two mode fiber
 
I assumed you meant "frequency". Your explanation of "different light modes" makes me even more confused as to what you mean!
 
I believe he's just referring to multimode fibre. And yes the different modes can interfere.
 
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