The refractive index changes reach values up to 0.008 and are characterized by a graded index profile with an exponential decay, which reaches a depth of about 6 to 8 µm (estimated from the refractive index change, which is proportional to 1/e) [3].
The refractive index changes reach values up to 0.008 and are characterized by agraded index profile with an exponential decay, which reaches a depth of about 6 to 8 µm (estimated from therefractive index change, which is proportional to 1/e) [3].