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High speed photoelectric real-time oscilloscope system

A photoelectric and oscillographic technology, applied in optics, nonlinear optics, instruments, etc., to achieve the effects of ensuring system accuracy, compensating for periodic fading, and increasing attenuation amplitude and delay

Active Publication Date: 2012-08-22
交芯科(上海)智能科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

OTDM distributes the sampled signals to their own optical paths according to different timings, and each path performs photoelectric conversion and quantization encoding. This method can obtain a high sampling rate, but it needs to precisely control the timing of each optical path.

Method used

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  • High speed photoelectric real-time oscilloscope system

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0035] 1. Electro-optic sampling technology

[0036] Electro-optic sampling is to load the information carried by the microwave RF signal to the optical sampling clock through the electro-optic modulator. The modulator bias point dynamic correction module (MBC) is used to suppress the bias point drift. The suppression technology adopts the ordinary intensity modulator, and the sampling single-arm chirped double-terminal output modulation mode. Such as figure 2 As shown, the chirped optical pulse enters through the port 121 of the electro-optic modulator and is divided into the first chirped optical pulse signal and the second chirped optical pulse signal, and the microwave signal 23 is modulated to The chirped optical pulse signal of the first channel passes through the...

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Abstract

The invention discloses a high speed photoelectric real-time oscilloscope system, wherein a hyper-stable and ultra-short light pulse emitted by a femtosecond laser passes through a dispersive medium, a polarization controller and a light amplifier after being subjected to frequency femtosecond through a time wave length mapping technology; a microwave RF (radio frequency) signal is modulated by using a single arm double end output electric optical modulator; then the RF signal is pulled on time through a time domain multiple connection module and the dispersive medium; then each channel is accessed with an electro optical detector through a wavelength division multiplexing device; finally each channel in input to a multiple-channel analog to digital converter. At the same time, a self-adaptive feedback system is adopted so as to correct the influence of the external environment interference to the dispersive medium and ensure the system precision. According to the system, the signal simulation bandwidth is improved greatly, the periodic fading caused by the dispersion is compensated, the dispersive shake, the signal distortion and the multiple channel composite error caused by the external environment are corrected dynamically, the time measurement precision is improved, and system has the prospect of wide use in fields such as optical communication and the like.

Description

technical field [0001] The invention relates to a high-speed photoelectric real-time oscilloscope, in particular to a high-speed photoelectric real-time oscilloscope system. Background technique [0002] Analog-to-digital conversion (ADC) is one of the basic means of information processing. It has important applications in both communication and non-communication fields. Due to the limitation of the "electronic bottleneck", mainly the influence of the jitter level of the electrical clock, the electrical analog-to-digital conversion cannot meet the requirements of the broadband digital signal processing system at present. [0003] Photonics technology has the characteristics of broadband and high precision. At present, the jitter of ultrashort optical pulse has reached about 10fs (femtosecond), which has the potential to significantly improve the performance of analog-to-digital conversion. Therefore, with the advancement of mode-locked laser technology, the development of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/035
Inventor 卢加林陈建平邹卫平吴龟灵周林杰
Owner 交芯科(上海)智能科技有限公司
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