ИСТИНА

Microring and microdisk optical resonators are widely used in physical measurements and technical applications. The possibility to reach very high quality factor (value as high as 1011 was demonstrated for CaF2 mm size disks) makes them extremely attractive for creating unique instruments, like high resolution spectrometers, laser distance and speed meters, frequency standards. The long lifetime of photons in the resonator material determines the low threshold for the manifestation of nonlinear effects and the possibility to resolve quantum evolution. Nowdays the technology has become mature enough for mass production of chips with resonators, the quality factor of which reaches 109 at given dispersion and coupling parameters. In our recent research we study the effects that occur when pumping is close to the threshold of parametric instability and when it is much higher. Experiments were made on the Si3N4 platform, with single and dual semiconductor laser pump in the self-injection locking regime. It was shown that in the case of the dual pump the lasers became mutually coupled, even when locked to different modes of the microresonator. The important role of thermal effects was also revealed. The auto and cross phase modulations arising in the microresonators with Kerr non-linearity make it possible to implement purely quantum effects: the generation of a nonclassical states of light and quantum-non-demolishing measurements. However, their experimental demonstration turns out to be extremely difficult due to losses in the outcoupling and detection scheme. We will discuss possible solutions of the problem and report the progress in our experiments.