group index ( N )


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. (188) Note: For a plane wave of wavelength , the group index may also be expressed,

where n is the phase index of wavelength .


This HTML version of FS-1037C was last generated on Fri Aug 23 00:22:38 MDT 1996