Self-generating system and method of soliton frequency comb based on negative thermo-optic coefficient chalcogenide microcavity

Abstract

The invention discloses a soliton frequency comb self-generating system and method based on a negative thermo-optic coefficient chalcogenide microcavity. A tunable laser emits pump light with a preset wavelength and power, and the power is adjusted by a fiber amplifier and then input to 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-optic coefficient micro-ring resonator, and controls the pump light to enter the negative thermo-optic coefficient micro-ring resonator through the tunable optical attenuator; The pump light is set to perform frequency tuning near the resonant peak frequency. With the rapid heat accumulation inside the microring resonator, the resonant peak of the negative thermo-optic coefficient microring resonator exhibits a blue-shift effect, showing the energy change at the blue detuning of the resonant peak. Steep, slow energy change at red detuning. By using the present invention, high-efficiency soliton frequency comb self-generation is realized, and the stability of the frequency comb is higher. The invention can be widely used in the field of optoelectronic technology.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and in particular relates to a system and method for self-generating soliton frequency combs based on negative thermo-optic coefficient chalcogenide microcavities. Background technique [0002] Optical frequency combs consist of a series of equally spaced and phase-locked optical frequencies, which are spectrally comb-like and temporally represented as electromagnetic field oscillation envelopes with time widths on the order of femtoseconds. Optical frequency combs have extremely important applications in the fields of optical atomic clocks, chemical detection, coherent optical communication, and LiDAR ranging due to their advantages of high precision, high resolution and high precision in frequency and time. Optical frequency combs based on microresonators are generated by the Kerr nonlinearity of optical resonator microcavities, and have extremely small size and power consumption, promi...

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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