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A device and method for generating a calibrated ultrafast pulse signal

A technology of ultra-fast pulses and ultra-fast electrical pulses, which is applied to measuring devices, instruments, and measuring electrical variables, etc., can solve the problem that the rise time of broadband real-time oscilloscopes cannot be calibrated accurately, and achieve the effect of improving accuracy

Active Publication Date: 2016-05-11
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method for generating a calibrated ultrafast pulse signal to solve the problem that the rise time of a broadband real-time oscilloscope cannot be calibrated accurately, and to improve the accuracy of calibration

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  • A device and method for generating a calibrated ultrafast pulse signal

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Embodiment Construction

[0035] The present invention will be further described below according to the accompanying drawings.

[0036] A device for generating a calibrated ultrafast pulse signal, comprising a microwave signal source 1, a power divider 2, a first femtosecond laser 3, a second femtosecond laser 4, a first focusing lens 5, and a DC voltage source 6 , DC probe 7, photoconductive switch 8, optical delay line 9, balanced photodetector 10, plane mirror 11, second focusing lens 12, chopper 13, function generator 14, lock-in amplifier 15, computer 16, microwave Probe 17.

[0037] The output end of the microwave signal source 1 is connected to the input end of the power divider 2, one output end of the power divider 2 is connected to the reference signal input end of the first femtosecond laser 3, and the other output end of the power divider 2 is connected to the second The femtosecond laser 4 is connected to the reference signal input end, the signal output end of the function generator 14 i...

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Abstract

The invention relates to a device for generating calibrated ultrafast pulse signals. The device comprises a microwave signal source, a power divider, a first femtosecond laser, a second femtosecond laser, a first focusing lens, a direct current voltage source, a direct current probe, an optical guide switch, an optical delay line, a balanced photoelectric detector, a plane mirror, a second focusing lens, a wave chopper, a function generator, a lock-in amplifier, a computer and a microwave probe. The device has the advantages of generating the pulse signals with ascending time less than 2 ps based on the femtosecond photoelectric technology and accurately measuring and calibrating the generated ultrafast pulse signals; as the calibrated ultrafast pulse signals can be used as standard ultrafast pulse signals for correcting the ascending time of a boardband real-time oscilloscope, the novel breakthrough of correcting the ascending time of the boardband real-time oscilloscope is achieved, the accuracy of correcting the ascending time is improved, and the complete tracing chain can be formed.

Description

technical field [0001] The present invention relates to a device for calibrating rise time, in particular a device for generating calibrated ultrafast pulse signals. Background technique [0002] Currently, the fastest rise time of a standard pulse generated by a commercial oscilloscope calibrator is 25 ps, which introduces a huge error into the calibration results of the rise time of a wideband oscilloscope. The non-linear transmission line generation technology based on pure electronics theory can generate fast pulses with a rise time of about 5 ps, but it is difficult to calibrate the pulses accurately and cannot form a complete traceability chain. big error. The commercial photodetector generation technology based on optoelectronics theory can generate fast pulses with a rise time of about 7ps, but the calibration of the photodetector’s own impulse response cannot form a complete traceability chain, and it is difficult to calibrate accurately. Large errors will be intr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
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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