I'm currently trying to calculate the effective refractive index n_(eff) of waveguides using the (measured) group index n_g and the wavelength lambda.
analianopolisca
Answered question
2022-08-12
I started with the relation between and :
Here I am stuck - if I know and the wavelength , can I use the above relationship to determine , or is there another approach that I should use?
Answer & Explanation
Chaya Garza
Beginner2022-08-13Added 10 answers
So
for some constant C, which you can establish using suitable boundary conditions.
To solve this using numerical data, as you have suggested in the comments, between and , you would replace the integral with a sum:
where is the wavelength spacing between measurements.
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