group refractive index of waveguides in photonic integrated circuits. The method provides a relative accuracy of 10-4 for group refractive index measurements and of 10-3 for its dispersion.
We present a high-resolution optical frequency domain reflectometry for characterization of group refractive index of waveguides in photonic integrated circuits. The method provides a relative accuracy of 10 -4 for group refractive index measurements and of 10 -3 for its dispersion.