The derivation of Eq. (4.46) assumes that the refractive index n is independent of wavelength. (a) Show that when n depends on , we have 11eb873a_5aa1_5ef8_af56_3fc03845e4ce_SM4986_11 ( b ) If the group refractive index ( n dn/d ) is 4.5 for GaAs at 850 nm, what is the mode spacing for a 400 -µ m-long laser.

Optical Fiber Communications 4th Edition by Gerd Keiser

النسخة 4الرقم المعياري الدولي: 978-0073380711

Optical Fiber Communications 4th Edition by Gerd Keiser

النسخة 4الرقم المعياري الدولي: 978-0073380711

تمرين 5

The derivation of Eq. (4.46) assumes that the refractive index n is independent of wavelength.
(a) Show that when n depends on , we have $The derivation of Eq. (4.46) assumes that the refractive index n is independent of wavelength. (a) Show that when n depends on , we have ( b ) If the group refractive index ( n dn/d ) is 4.5 for GaAs at 850 nm, what is the mode spacing for a 400 -µ m-long laser.$
( b ) If the group refractive index ( n dn/d ) is 4.5 for GaAs at 850 nm, what is the mode spacing for a 400 -µ m-long laser.

التوضيح

موثّق

(a)
Refer to equation 4.46 from the text...