Device and method for measuring time-domain waveforms of ultrafast pulses

Abstract

The invention relates to a device for measuring time-domain waveforms of ultrafast pulses. The device comprises a microwave signal source, a femtosecond pulse laser, a light guide probe, a coaxial-to-coplanar converter, a coplanar waveguide and a lock-in amplifier, wherein the microwave signal source provides a microwave signal source for an ultrafast pulse generator and the femtosecond pulse laser, so that the ultrafast pulse generator generates the ultrafast pulses; the coaxial-to-coplanar converter transmits the received ultrafast pulses to the coplanar waveguide to generate ultrafast pulse electric fields; and time-delay lasers stimulate the light guide probe to generate photosensitive currents under the effect of the ultrafast pulse electric fields, and sampling is conducted through the lock-in amplifier. The device has the advantages that the ultrafast pulses with the pulse width of sub-10ps can be measured, the ultrafast pulses transmitted coaxially can be measured, and the ultrafast pulses transmitted in a planar manner can also be measured, so that a new breakthrough in measurement of the time-domain waveforms of the ultrafast pulses is realized, and the level of measurement of instruments, equipment and devices, which can generate the ultrafast pulses, is raised.

Description

technical field [0001] The invention relates to a device for measuring time-domain waveforms, in particular to a device and method for measuring ultra-fast pulse time-domain waveforms. Background technique [0002] Today, the traditional measurement device for measuring time-domain waveforms of ultrafast pulses is a digital oscilloscope. The limitations of this measurement setup lie in the bandwidth and rise time of the digital oscilloscope, as well as its high measurement capability only for signals transmitted by coaxial systems. Currently, the highest bandwidth of commercially available oscilloscopes is 100GHz sampling oscilloscope and 65GHz real-time oscilloscope. The theoretical value of the rise time is about 4ps and 6ps, which cannot meet the measurement of ultra-fast pulse time-domain waveform with decreasing pulse half-amplitude width. need. [0003] With the development of ultrafast pulse generation technology, photoelectric technology can generate ultrafast puls...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a device and method for ultra-fast pulse time-domain waveform measurement, which solves the problem of traditionally using an oscilloscope to measure ultra-fast pulse time-domain waveforms. Due to the current limitation of oscilloscope bandwidth and rise time, When the oscilloscope measures the ultra-fast pulse time-domain waveform, it will introduce a large error to the measurement result

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