Method and system for real-time measurement of ultrafast space-time-frequency information based on time-space-frequency compression
A technology for real-time measurement and frequency information, applied in the direction of instruments, etc., can solve the problems of one-sidedness, complex space of ultra-fast light field, and inability to obtain space information and frequency information of ultra-fast light field simultaneously, and achieve the effect of wide application prospects
Active Publication Date: 2021-08-06
SOUTH CHINA UNIV OF TECH
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However, ultrafast light fields often have spatial complexity, that is, there are differences between signals at different spatial positions. The above-mentioned traditional measurement schemes only have the resolution capability in the time domain, and cannot simultaneously obtain the spatial information and frequency information of ultrafast light fields. , leading to the one-sidedness of the obtained results
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[0040] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
[0041] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0042] In o...
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The present application relates to a method and system for real-time measurement of ultrafast time-space-frequency three-domain information based on time-space-frequency compression. The method includes: generating an ultrafast pulsed light signal in a physical system to be observed; performing intensity modulation spatial encoding processing on the ultrafast pulsed light signal; and performing the time domain sequence of the coded ultrafast pulsed light signal in a spatial and horizontal direction through a space-time editor. Arranging; the time-space distribution encoding form of the encoded ultrafast pulsed optical signal is subjected to frequency splitting processing through the frequency space editor; the encoded time-space-frequency synchronized ultrafast pulsed optical signal is frequency-time-delayed through a frequency-time delayer; high-frequency resolution encoding The time-space-frequency synchronous ultrafast pulsed light signal is compressed and collected in real time through the area array detector to obtain compressed coded data information; the data is decompressed and decoded according to the compressed coded data information to obtain the time-space-frequency three-domain synchronization information of the ultrafast pulsed light signal. Real-time measurement of ultra-fast space-time-frequency three-domain information can be realized.
Description
technical field [0001] The invention relates to the technical field of ultrafast signal measurement, in particular to a method and system for real-time measurement of ultrafast time-space-frequency information based on time-space-frequency compression. Background technique [0002] Due to its short duration, high peak power, and wide spectrum, ultrafast pulsed lasers are widely used in various disciplines. Ultrafast light fields (light fields as short as picoseconds and femtoseconds) have the same or similar dynamics as many natural phenomena in the atmosphere and water. Disasters caused by dynamics play an irreplaceable role. After years of development, a variety of technologies and methods have been developed for ultrafast optical field time-domain measurement, such as autocorrelation techniques for estimating femtosecond and picosecond pulse widths, and for characterizing femtosecond pulses. Frequency-resolved optical gate technology (FROG) for full-field information (am...
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IPC IPC(8): G01J11/00
CPCG01J11/00G01S7/295G04F13/026
Inventor 杨中民郭元锴韦小明
Owner SOUTH CHINA UNIV OF TECH