Electro-optic sampling method based on polarization rotation effect of electroabsorption modulator

Abstract

The invention provides an electro-optic sampling method based on the polarization rotation effect of an electroabsorption modulator. By adjusting the optical working parameter and the voltage working range of an electro-optic sampling system, the method utilizes the polarization rotation effect of the electroabsorption modulator to obtain the e1ectrooptic property that the output light power is linearly increased along with the voltage strength of an input signal; and the e1ectrooptic property is utilized to accomplish the linear modulation of the pulse strength of an input sampling light by signal voltage, so as to obtain the sample of the signal voltage. The method has the advantages of small volume, easy assembly, high modulation sensitivity and sampling rate, etc. The method greatly promotes the realization of real-time disturbance-free measurement of characteristics of the next generation of optical analog-to-digital converters and ultraspeed electronic devices.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, the field of integrated optics and the field of photoelectric signal processing, and particularly relates to an electro-optic sampling method based on an electro-absorption modulator. Background technique [0002] Electro-optic sampling is a photoelectric signal conversion technology, which utilizes the analog signal voltage to be sampled to modulate the sampled optical pulse signal through a certain electro-optical medium to obtain an optical pulse signal output whose intensity is linearly modulated, and realizes real-time acquisition of analog electrical information and Measurement. like figure 1 As shown, the optical input terminal 1 of the electro-optic sampling system inputs a sampling optical pulse with a high repetition rate and equal amplitude, and at the same time inputs the analog signal voltage to be sampled at the electrical input terminal 2, and the optical power can be obta...

AI Technical Summary

Problems solved by technology

The electro-optic sampling method based on the semiconductor optical amplifier (SOA) is used to solve the shortcomings of the previous electro-optic sampling that cannot be integrated, but it requires a higher drive current

In addition, semiconductor optical amplifiers have the characteristics of long carrier life, which restricts the sampling rate, and the sampling rate that can be achieved is not very high.

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