ATIS Telecom Glossary
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group index (N)

In fiber optics, for a given mode propagating in a medium of refractive index , the velocity of light in vacuum, c, divided by the group velocity of the mode. Note: For a plane wave of wavelength , the group index may also be expressed, equation 20

where n is the phase index of wavelength .

 

 

 

 

 

 

 

 

 

 



 
These definitions were prepared by ATIS Committee PRQC
 
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