High-performance electric sampling system and method based on time lens

• Main Authors: JIN SIYING, GUO SHUQIN
• Format: Patent
• Language: Chinese; English
• Published: 07.01.2022
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The invention belongs to the technical field of electric sampling, and discloses a high-performance electric sampling system and method based on a time lens. The method comprises the steps of: S1, modulating a high-frequency analog electric signal to an optical pulse, so as to form a modulation signal; S2, performing a four-wave mixing effect on the pump light and the modulation signal to obtain a broadened modulation signal; S3, recovering a broadened high-frequency analog electric signal from the broadened modulation signal; and S4, sampling the broadened high-frequency analog electric signal. The system and the method have the advantages that an optical signal is broadened through a time lens imaging amplification system, so that the modulated high-frequency analog electric signal to be processed is broadened at the same time, and subsequent sampling is facilitated. Sampling of high-frequency analog electric signals is completed at a low sampling rate by adopting the time lens technology, the performance o