Soliton frequency comb self-generation system and method based on negative thermo-optical coefficient chalcogenide microcavity

Abstract

The invention discloses a soliton frequency comb self-generation system and method based on a negative thermo-optical coefficient chalcogenide microcavity, and the method comprises the steps: a tunable laser emits pump light with preset wavelength and power, the power is adjusted through an optical fiber amplifier, and the pump light is input into a polarization controller, the polarization controller adjusts the polarization state of the pump light to be consistent with the designed polarization mode of the negative thermo-optical coefficient micro-ring resonant cavity, and the pump light is controlled to enter the negative thermo-optical coefficient micro-ring resonant cavity through the tunable optical attenuator; pump light is set to be subjected to frequency tuning near the resonance peak frequency, along with rapid heat accumulation in the micro-ring resonant cavity, the resonance peak of the negative thermo-optical coefficient micro-ring resonant cavity has a blue shift effect, the energy change at the blue detuning position of the resonance peak is steep, and the energy change at the red detuning position of the resonance peak is slow. According to the invention, high-efficiency soliton frequency comb self-generation is realized, and the stability of the frequency comb is higher. The method can be widely applied to the technical field of photoelectricity.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and in particular relates to a soliton frequency comb self-generation system and method based on a negative thermo-optic coefficient chalcogenide microcavity. Background technique [0002] An optical frequency comb consists of a series of equally spaced and phase-locked optical frequencies, which appear as a comb-like spectrum in the spectrum and an electromagnetic field oscillation envelope with a time width of femtoseconds in the time domain. Optical frequency combs have extremely important applications in fields such as optical atomic clocks, chemical detection, coherent optical communications, and optical radar ranging because of their high-precision, high-resolution, and high-precision advantages in frequency and time. The optical frequency comb based on the microresonator is generated by the Kerr nonlinearity of the optical resonant microcavity, has extremely small size and power co...

AI Technical Summary

Problems solved by technology

However, the current platforms used to fabricate microring resonators are mainly materials with positive thermo-optic coefficients and have strong thermo-optic effects.

This leads to a slow energy transition at the blue detuned part of the microring resonator during the generation of the optical frequency comb, while a steep and rapid energy change at the red detuned part, which makes the energy change of the pump wavelength into the resonant peak of the red detuned part drastic , and the soliton generation area at the red detuning place is short and difficult to lock, resulting in the difficulty of rapid generation and poor stability of the current optical soliton frequency comb

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