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Noise measurement and stabilitycontrol method and system of ultra-short optical pulse amplification compression system CEP

A compression system and pulse amplification technology, which is applied in the field of ultra-fast phenomena and precision measurement, can solve the problems of high pulse width and energy requirements, and cannot adapt to single-shot measurement of high repetition frequency optical pulse carrier envelope phase, etc., to achieve full Stable control of frequency bandwidth to realize the effect of full frequency bandwidth measurement

Active Publication Date: 2021-06-01
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a simple and practical ultrashort optical pulse amplification and compression system CEP noise measurement method and system in order to address the above-mentioned deficiencies in the prior art. The complex method of bias frequency overcomes the fact that the existing interferometric spectrometry method cannot adapt to the single-shot measurement of the high repetition frequency optical pulse carrier envelope phase, and the CEP measurement method of the high-energy electron spectrum is only suitable for the CEP measurement of the few-period pulse, and the measurement The process requires high pulse width and energy

Method used

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  • Noise measurement and stabilitycontrol method and system of ultra-short optical pulse amplification compression system CEP
  • Noise measurement and stabilitycontrol method and system of ultra-short optical pulse amplification compression system CEP
  • Noise measurement and stabilitycontrol method and system of ultra-short optical pulse amplification compression system CEP

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Embodiment 1

[0073] This embodiment provides a CEP noise measurement system of an ultrashort optical pulse amplification and compression system, such as figure 2 As shown, the measured ultrashort optical pulse amplification and compression system is a general-purpose chirped pulse amplification system, and the chirped pulse amplification system includes a pulse stretcher, an amplifier, and a pulse compressor;

[0074] The measurement system includes a seed pulse source, a beam splitter, an acousto-optic frequency shift unit, a beat frequency signal detection unit and a power spectral density measurement unit;

[0075] Wherein, the acousto-optic frequency shift unit includes an acousto-optic frequency shifter and a radio frequency signal source that applies a frequency stabilization signal to the acousto-optic frequency shifter;

[0076] The seed light emitted by the seed pulse source (this embodiment adopts a mode-locked pulse oscillator) is divided into two beams of light by a beam split...

Embodiment 2

[0087] In order to realize the stable control of the carrier envelope phase CEP of the ultrashort optical pulse amplification and compression system, this embodiment provides a stable control system for the ultrashort optical pulse amplification and compression system CEP, such as image 3 As shown, the measured ultrashort optical pulse amplification and compression system includes an optical fiber same-frequency amplification unit and a spectrum stretching compressor;

[0088] The stable control system includes a bias frequency stable mode-locked fiber oscillator, a first beam splitter, an electro-optic dispersion modulator, a second beam splitter, an acousto-optic frequency shift unit, a beat frequency signal detection unit, and a power spectral density measurement unit, Phase detection and stabilization unit;

[0089] The acousto-optic frequency shift unit includes an acousto-optic frequency shifter and a radio frequency signal source that applies a frequency stabilization ...

Embodiment 3

[0105] This embodiment provides a CEP stability control system for an ultrashort optical pulse amplification and compression system, such as Figure 4 As shown, the measured ultrashort optical pulse amplification and compression system includes a pulse stretcher, a frequency reduction amplification unit and a pulse compressor arranged sequentially along the optical path;

[0106] The stable control system includes a bias frequency stable Ti:sapphire oscillator, a third beam splitter, an electro-optical dispersion modulator, a fourth beam splitter, an acousto-optic frequency shift unit, a beat frequency signal detection unit, a power spectral density measurement unit, and a phase Detection and stabilization unit;

[0107] The acousto-optic frequency shift unit includes an acousto-optic frequency shifter and a radio frequency signal source that applies a frequency stabilization signal to the acousto-optic frequency shifter (in this embodiment, the radio frequency signal source a...

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Abstract

The invention discloses a noise measurement and stability control method and system of an ultra-short optical pulse amplification compression system CEP, and the implementation principle is as follows: seed light passes through the ultra-short optical pulse amplification compression system, and then passes through an acousto-optic frequency shifter to generate optical frequency shift; the frequency shift amount of the optical frequency shift comes from a stable radio frequency signal applied externally, so that signal light with additional bias frequency relative to the bias frequency of the seed light is generated; carrying out beat frequency on the signal light carrying the additional bias frequency and the seed light to obtain a beat frequency signal; the noise spectrum of the CEP noise signal generated by the ultra-short optical pulse amplification and compression system can be obtained by measuring the power spectrum density of the beat frequency signal; performing phase comparison detection on the beat frequency signal and the radio frequency signal to obtain a phase detection signal; and a phase detection signal is fed back to the photoelectric dispersion modulator through phase-locked amplification so as to realize full-band bandwidth stable control of the CEP. The method is simple and practical in implementation process, and is suitable for various forms of ultra-short light pulse amplification and compression systems.

Description

technical field [0001] The invention belongs to the technical field of ultrafast phenomena and precision measurement, and in particular relates to a simple and practical ultrashort optical pulse amplification and compression system CEP noise measurement and stability control method and system. Background technique [0002] At present, research in the field of optics in the field of optical frequency scales and ultrafast phenomena has reached 10-18 frequency standard precision and 10-18 second time precision. The main contribution to both comes from the generation of ultrashort optical pulses. [0003] The absolute frequency of the optical frequency marker f=f ceo +nf r The improvement of standard precision is strongly dependent on the repetition rate f of the optical frequency comb with ultrashort optical pulses r and bias frequency f ceo stability. The study of the interaction between light and matter under extreme conditions, especially the study of deeper high-order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/42G01J11/00
CPCG01J1/42G01J11/00G01J2001/4238
Inventor 王屹山程昭赵卫王向林
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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