Enforcing single longitudinal mode operation via coherent addition?

Holography related topics.
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pluto
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Joined: Fri Feb 05, 2016 2:06 am

Enforcing single longitudinal mode operation via coherent addition?

Post by pluto »

Found something interesting while wandering laser-related stuff on Wikipedia:

https://en.wikipedia.org/wiki/Coherent_addition
The addition of lasers reduces the number of longitudinal modes in the output beam; the more lasers are combined, the smaller is the number of longitudinal modes in the output. The simple estimates show that the number of output modes reduces exponentially with number of lasers combined.
This is very interesting to the holographer, as it both provides high power and narrow linewidth!

Would this be feasible for a home-baked holography laser?
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