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

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...

AI Technical Summary

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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