Tunable all-optical oscillator based on thermo-optic tuning mechanism of silicon-based microring resonator

Abstract

The invention discloses an adjustable all-optical oscillator based on a silicon-based micro-ring resonant cavity thermo-optically tuning mechanism. The adjustable all-optical oscillator comprises an incidence light source, a light amplifier, a tunable micro-ring resonant cavity, a light signal test system and a feedback control system. The light amplifier is located on a light path of the incidence light source and used for adjusting light power. The tunable micro-ring resonant cavity is located on the light path of the incidence light source and used for generating adjustable MHz magnitude optical oscillation waveforms. The light signal test system is located on the light path of the incidence light source and used for testing signals of output light. The input end of the feedback control system is connected with the output end of the light signal test system, the output end of the feedback control system is connected with the control end of the light amplifier, and the control end of the feedback control system is connected with an electrode pin of the tunable micro-ring resonant cavity. The feedback control system extracts code patterns and the frequency information of the signals of the output light, controls the currents and the duration of a micro type heater and controls the power of the output light of the light amplifier. The technology of the adjustable all-optical oscillator is compatible with the CMOS technology, integration and miniaturization are facilitated, the external interference resisting performance of the adjustable all-optical oscillator is good, and the output oscillation frequency and the waveform stability is high.

Description

technical field [0001] The invention relates to the fields of optical communication and photon information processing, in particular to an adjustable all-optical oscillator based on a thermo-optical tuning mechanism of a silicon-based micro-ring resonator cavity in all-optical communication. Background technique [0002] In the fields of optical communication and photonic information processing, realizing all-optical control has always been the direction that people are striving to pursue. All-optical oscillators can be used for optical clock signal generation and signal routing. The current general method for generating optical oscillations is to use electrical signal frequency generators and electro-optic modulators to transfer electrical signals to optical signals. But the biggest disadvantage of this method is that high-frequency electrical signal generators and electro-optical modulators must be used, so the power consumption is large, and it is not conducive to all-op...

AI Technical Summary

Problems solved by technology

But the biggest disadvantage of this method is that high-frequency electrical signal generators and electro-optical modulators must be used, so the power consumption is large, and it is not conducive to all-optical integration and fast routing selection

[0003] All-optical oscillation can be realized based on a silicon-based microdisk, such as the article published by T.J. Johnson et al. (“Self—induced optical modulation of the transmission through high—Qsilicon microdiskresonator,” Opt.Express14(2), 2006: 817—831), the microdisk adopts a suspended structure surrounded by air The layer is coupled by optical fiber, so its thermal diffusion time and carrier lifetime are difficult to adjust in a large range through technological means, which means that the frequency of all-optical oscillation based on this structure can only be changed within a very narrow range.

Due to the lack of external force constraints, the suspended structure and fiber coupling method adopted have poor stability, and optomechanical oscillation occurs under strong incident light, so it is difficult to achieve long-term stable oscillation waveforms

Images