Interference between different mode of light

[watertreader]

Hi,

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

Thanks

 

[mikeph]

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.

 

[jtbell]

What do you mean by "different light modes?"

 

[watertreader]

hi,

I am thinking of mode as in the mode in fiber...specifically toying around the idea of a two mode fiber

 

[mikeph]

I assumed you meant "frequency". Your explanation of "different light modes" makes me even more confused as to what you mean!

 

[reasonableman]

I believe he's just referring to multimode fibre. And yes the different modes can interfere.