The follow up question is why the accumulated phase per unit length should be equal to k or k=nk0? How the wavevector equal to the phase per unit length?
The follow up question is why the accumulated phase per unit length should be equal to k or k=nk0? How the wavevector equal to the phase per unit length?
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Thank you for a quick respond. Would you please further explain how do you get the optical power formula? The only formula that I understand for optical power would be using Poynting vector (P = E*H = E^2/n), and I couldn't figure out how you get the term exp(-wbx/c). Also, b is the imaginary part of index of refraction and should be unitless. Here, 1/rad is still remained in n". The follow up question is why the accumulated phase per unit length should be equal to k or k=nk0? How the wavevector equal to the phase per unit length? Thank you.
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