Explain the difference between multimode and single mode core-cladding concentricity errors.

Explain the difference between multimode and single mode  core-cladding concentricity errors.
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Answer :

Multimode core-cladding concentricity error is the distance  between the core and cladding centers expressed as a percentage of  core diameter while the single mode core-cladding concentricity error  is just the distance between the core and cladding centers
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