At a wavelength of 1100 nm pure silica glass has an index of refraction of 1.449. Use Fig. 7.22 to (a) Determine its group index at that wavelength. (b) Find its group velocity. (c) Compare that to its phase velocity.

Fig. 7.22 

Transcribed Image Text:

1.49 1.48 1.47 Пg 1.46 1.45 п 1.44 500 700 900 1100 1300 1500 1700 1900 Light Infrared Wavelength (nm) Index of refraction