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Optical analog-to-digital conversion device with sampling rate capable of being reconfigured according to any power of 2

A sampling rate, optical mode technology, applied in the field of optical information processing, can solve the problems of the reduction of the reconstruction response rate and the destruction of channel matching, and achieve the effect of ensuring the response speed

Active Publication Date: 2016-02-10
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, changes in the number of multiplexed channels often lead to the destruction of channel matching, and recalibration and matching of channels will cause a decrease in the reconstruction response rate

Method used

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  • Optical analog-to-digital conversion device with sampling rate capable of being reconfigured according to any power of 2
  • Optical analog-to-digital conversion device with sampling rate capable of being reconfigured according to any power of 2
  • Optical analog-to-digital conversion device with sampling rate capable of being reconfigured according to any power of 2

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Embodiment Construction

[0025] A specific implementation example of the present invention is given below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0026] In this example, if figure 1 As shown, the pulsed laser 1 adopts a passive mode-locked laser, and its output repetition frequency is f 0 Optical sampling clock 6 = 1 / T. In the reconfigurable repetition rate multiplication module 2, the spectrum 7 of the optical clock generated by the laser is passed through a 2 N channel after the first multiplexer 2-1, generating 2 N channels have the same sampling rate f 0 optical sampling clock. Each channel is connected to the first switch device 2-2 and its state is controlled by the working state control module 5, realizing the number of channels by...

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Abstract

The invention relates to a high resolution reconfigurable optical analog-to-digital conversion method and device, in particular to an optical analog-to-digital conversion device with the sampling rate capable of being reconfigured according to any power of 2. The device comprises a pulse laser, a reconfigurable repetition frequency multiplication module, an electro-optic signal sampling module and a reconfigurable signal quantization and reconstruction module. According to the device, a high-stability passively mode-locked pulse laser is adopted as a system optical clock, and a heavy frequency multiplication module based on a multi-channel multiplexing technology is used, so that high speed optical clock signals can be effectively acquired. A switching device is used for changing channel numbers of the heavy frequency multiplication module and a back-end parallel photoelectric conversion and quantization module, so that multiplication of the light sampling rate is realized according to reconfigurability of power of 2, time delay and range matching are not required to be readjusted after marked, and the switching speed of the system in working states is guaranteed by quick response of the switching device. Besides, high speed optical sampling of electric signals is realized by the aid of an ultra broadband electro-optic modulator (or an electro-optic sampling gate), and finally, high speed optical analog-to-digital conversion is realized by the aid of parallel photoelectric conversion, parallel electric quantization and parallel data processing.

Description

technical field [0001] The invention relates to the technical field of optical information processing, in particular to an optical analog-to-digital conversion device whose sampling rate can be reconfigured according to any power of 2. Background technique [0002] Optical analog-to-digital conversion technology (PADC) utilizes the high-speed and broadband characteristics of photonics to realize the acquisition and processing of high-speed signals. It has the advantages of high sampling rate, large bandwidth, no electronic bottleneck, and easy parallel processing. Efficient approach for analog-to-digital conversion systems. At present, a variety of optical analog-to-digital conversion technology solutions have been proposed, including optical-assisted analog-to-digital converters, optical-sampled electrical analog-to-digital converters, electrical sampling and optical-quantized analog-to-digital converters, and all-optical analog-to-digital converters. Among them, the analo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F7/00
CPCG02F7/00
Inventor 邹卫文杨光陈建平
Owner SHANGHAI JIAO TONG UNIV
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