Design conditions in the middle range for implementation of integrated ring resonators in LiNbO3 by direct laser writing

The aim of this work is to design an integrated optical ring resonator to be implemented in LiNbO3 with a 2.5 mm radius and an operating wavelength of 1550 nm. Considering these ring parameters, a free spectral range of 71.54 pm and a quality factor of ~5 × 105 were calculated. The authors apply results to improve the implementation of femtosecond laser writing in lithium niobate crystals. As it i...