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

A technology of ultra-fast pulse and time-domain waveform, applied in the direction of digital variable display, etc., can solve problems such as measurement result errors, achieve the effect of improving accuracy and improving measurement level

Active Publication Date: 2014-01-22
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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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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  • Device and method for measuring time-domain waveforms of ultrafast pulses

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Embodiment Construction

[0026] The present invention will be further described below according to the accompanying drawings.

[0027] figure 1 It is a schematic diagram of a device for ultrafast pulse time-domain waveform measurement according to a preferred embodiment of the present invention. The measuring device includes a reference signal output terminal A1 and an ultrafast pulse signal input terminal A2. The device further includes a microwave signal source 1, a second pulse laser 2, a delay unit, a photoconductive probe 4, an ultrafast pulse modulator 6, a coaxial to coplanar converter, a coplanar waveguide 8, a function generator 9, and a power divider device 10, lock-in amplifier 11, and control and computing means. The microwave signal source 1 is used to generate the first microwave signal and the second microwave signal with a common time base, its first output terminal is connected to the frequency stabilization reference input terminal of the femtosecond pulse laser 2, and the second o...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/02
Inventor 龚鹏伟谢文马红梅杨春涛姜河谌贝
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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