I am overlapping multiple focused beams (different wavelengths) at the focal plane of the fiber coupling lens. What would be the expected coupling efficiency in this case?
Is there a factor of 1/n in insertion loss, where n is the number of beams?
If the beams of different wavelength can be combined by dichroic mirrors, a prism or a grating without loss into one spatial mode one can achieve the full coupling efficiency for each of the wavelengths.
If the beams of different wavelength can be combined by dichroic mirrors, a prism or a grating without loss into one spatial mode one can achieve the full coupling efficiency for each of the wavelengths.
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