A device and method for measuring the phase spectrum of a comb spectrum generator

A comb spectrum generator and phase spectrum technology, applied in the direction of measuring devices, measuring electrical variables, phase angle between voltage and current, etc., can solve the problems of measurement bandwidth and measurement efficiency limitations, and achieve less correction processing and traceability chain full effect

Active Publication Date: 2016-08-24
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 for measuring the phase spectrum of a comb spectrum generator to solve the limitations of the traditional oscilloscope-based measurement method on the measurement bandwidth and measurement efficiency

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  • A device and method for measuring the phase spectrum of a comb spectrum generator

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Embodiment Construction

[0034] The present invention will be further described below according to the accompanying drawings.

[0035] The device includes a reference signal output terminal A1 for outputting the first microwave signal and a signal input terminal A2 for inputting a comb spectrum signal synchronized with the femtosecond pulsed laser beam, and the device further includes a first microwave signal source 1 , second microwave signal source 2, comb spectrum generator 3, GSG microwave probe 4, coplanar waveguide 5, femtosecond pulse laser 6, chopper 7, polarizer 8, optical delay line 9, λ / 2 Wave plate 10, polarization compensator 11, λ / 4 wave plate 12, polarization beam splitter 13, balanced photodetector 14, lock-in amplifier 15, control and calculation unit 16 and function generator 17.

[0036] The 10MHz reference signal output end of the first microwave signal source is connected with the 10MHz reference input end of the second microwave signal source, and the other output end of the fir...

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Abstract

The invention relates to a device for measuring the phase spectrum of a comb generator, which device comprises a reference signal output terminal for outputting said first microwave signal and a comb spectrum for inputting a femtosecond pulsed laser beam synchronously The signal input end of the signal, the device further includes a first microwave signal source, a second microwave signal source, a GSG microwave probe, a coplanar waveguide, a femtosecond pulse laser, a chopper, a polarizer, an optical delay line, a λ / 2 wave plate, polarization compensator, λ / 4 wave plate, polarizing beam splitter, balanced photodetector, lock-in amplifier, control and calculation unit and function generator. The invention has the advantage that it can accurately measure the time-domain waveform of the comb spectrum generator based on the photoelectric technology, and then obtain the phase spectrum of the comb spectrum generator. The device can theoretically measure a comb generator with a bandwidth up to 110GHz, and compared with the traditional comb generator phase spectrum measurement method, it has the advantages of less correction processing and a complete traceability chain.

Description

technical field [0001] The invention relates to a phase spectrum measuring device, in particular to a device and method for measuring the phase spectrum of a comb spectrum generator. Background technique [0002] The traditional method to obtain the phase spectrum of the comb spectrum generator is: use an oscilloscope to measure the time domain waveform of the comb spectrum generator, and check the time base distortion, time base jitter and impedance mismatch, and the impact response of the oscilloscope itself in the oscilloscope measurement. The influence is corrected to obtain a more accurate time-domain signal waveform, and then the signal is Fourier transformed to obtain the phase spectrum of the comb spectrum generator. The bottleneck of this measurement device is that a large number of complex corrections are required, the measurable bandwidth of the comb spectrum generator is limited by the bandwidth of the oscilloscope itself, and a complete traceability chain cannot...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R25/00G01R23/17
Inventor 姜河龚鹏伟谢文马红梅杨春涛
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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