An all-optical clock extraction chip based on microring resonator

Abstract

The invention discloses an all-optical clock extraction chip based on a microring resonator, and belongs to the technical field of all-optical signal processing. It includes two parts: a microring optical parametric oscillator and a microring filter. Among them, the microring optical parametric oscillator is composed of a large helical ring, a first sub-ring and a second sub-ring, and the helical macroring is used as a nonlinear medium for parametric amplification to overcome ring loss; electrodes are added to the two sub-rings , the optical parametric oscillator transmission spectrum is controlled by applying a voltage, so that only the extracted clock signal is circulated in the oscillator. The microring filter is used to suppress the interference of the high-order four-wave mixing product and improve the quality of the clock signal. Compared with the existing clock extraction technology, the clock extraction chip proposed by the present invention combines the advantages of passive filtering and active oscillation technologies, and can directly obtain high-quality clock signals in silicon-based photonic chips, which greatly improves the The level of integration of such devices.

Description

technical field [0001] The invention relates to the technical field of all-optical signal processing, in particular to an all-optical clock extraction chip realized by using a microring resonator. Background technique [0002] With the continuous improvement of network bandwidth, all-optical signal processing technology will play an important role in future large-capacity, strong real-time optical fiber communication networks. As one of its core functions, the all-optical clock extraction technology directly obtains the constant-rate optical clock from the input signal, and participates in the retiming process of the signal 3R regeneration, and at the same time serves as a control signal to regulate the optical switch matrix. Therefore, in the all-optical switch node, the Play an important role. [0003] At present, there are two ways to realize all-optical clock extraction: passive filtering and active oscillation. The passive filtering method mainly relies on the comb fi...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an all-optical clock extraction chip based on a micro-ring resonator, that is, to overcome the problem of clock quality degradation caused by low fineness in the existing micro-ring resonator clock extraction scheme, and to obtain a micron Mode-locking in photonic chips on the order of magnitude reduces device sensitivity to ambient temperature

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