Periodic Reporting for period 2 - SOLIRING (Solitons and frequency combs in micro-resonators)
Période du rapport: 2018-01-01 au 2019-02-28
The collaboration between scientists from photonics and applied mathematics communities in this project plays a critical role in the development of conceptually new theoretical approaches to the description of the frequency comb generation and microresonator designs and facilitates the interdisciplinary knowledge exchange.
The work is organized in three work packages (WPs):
- Frequency combs in microring resonators (WP1)
- Nonlinear SNAP microresonators (WP2)
- Lugiato-Lefever microring model through the prism of soliton theory (WP3)
Within the WP2 we have demonstrated the subangstrom precise fabrication of individual and coupled SNAP microresonators having the effective radius variation of several nanometers using the femtosecond laser inscription. We proposed a new type of broadband and low repetition rate frequency comb generator that has the shape of an elongated and nanoscale-shallow optical bottle microresonator created at the surface of an optical fiber. We demonstrated the two coupled bottle microresonators fabricated at the fiber surface with resonances that are matched with a better than 0.16 GHz precision.
We have studied numerically and analytically comb generation in SNAP microresonator and predicted effects of multistability of the SNAP modes.
Within the WP3 we have studied nonlinear dynamics of ring resonators with non-Kerr nonlinearities. Considering the exciton-polariton nonlinearities we have studied the existence and stability of the vectorial vortex and half-vortex states and taking the Raman nonlinearity we have identified threshold conditions for the soliton comb states.