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All-light analog-digital converter 2AMZSX parallel quantitative coding method

A digital converter and optical-mode technology, applied in the field of all-optical analog-to-digital converter 2AMZSX parallel quantization and encoding, can solve the problem that the peak power does not reach the optimal utilization rate, etc.

Inactive Publication Date: 2008-10-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In 2007, we applied for the Chinese invention patent "All-optical Analog-to-Digital Converter (200710049158.8)", which uses a symmetrical Sagnac interferometer quantization and encoding of N 1×2 coupler beam splitting input arrays to realize N-bit all-optical Analog-to-digital converters, but the peak power of the control light (analog light) pulses is not optimally utilized

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[0041] specific implementation

[0042] For purposes of summarizing the invention, certain aspects, advantages and novel features of the invention are described herein. It should be understood that not necessarily all such advantages can be achieved in accordance with any one particular embodiment of the invention. Accordingly, the invention is not to be limited to any particular embodiment disclosed.

[0043] refer to Figure 4 It is a schematic structural diagram of an embodiment of the 3-bit all-optical analog-to-digital converter of the present invention. High nonlinear dispersion shifted fiber γ=12W -1 km -1 . The control light is the stable laser emitted by the fiber laser, the maximum peak power P b (t) = 10W, wavelength λ 1 = 1560nm. Probe light pulse λ 2 =1552nm, T FWHM = 2ps, 10GHz / s mode-locked laser emits a chirp-free hyperbolic secant pulse with a pulse width T 0 =T FWHM / 1.76=1.136ps, average power P 0 = 2mW. The control light is incident in the dev...

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Abstract

The invention discloses a 2AMZSX parallel quantization coding method for an all-optical analog-to-digital converter. The method is as follows: the N-bit all-optical analog-to-digital converter is designed; stable sounding optical pulses and steering optical pulses (analog optical) are input into a splitting coupler array (2) through a wavelength division multiplexer or a polarization coupler (1); the coupler array (2) is formed by series connection of N-1 1x2 couplers, wherein, one output port of each 1x2 coupler is connected with an asymmetric Mach-Zehnder interferometer (3) and the other output port of each 1x2 coupler is connected with the next 1x2 coupler; and a band-pass filter or an analyzer (4) is arranged on a position of each asymmetric Mach-Zehnder interferometer (3) which is directly communicated with the output ports and only allows probe light to pass. The structure is combined with adequate splitting ratio of the coupler array (2) and the splitting ratio of a first coupler of each asymmetric Mach-Zehnder interferometer (3) to realize parallel output of Gray code pulses by the probe light.

Description

technical field [0001] The present invention relates to the technical field of optical information processing, in particular to an all-optical analog-to-digital converter 2AMZSX parallel quantization encoding method, that is, N asymmetrical Mach- Zehnder interferometer (Asym_MachZehnderI) parallel output, based on self-phase modulation (SPM) and cross-phase modulation (XPM) principle of parallel quantization and coding to realize N-bit all-optical analog-to-digital converter. Background technique [0002] Optical signal processing, optical communication, and optical sensing are in urgent need of high-speed, high-precision analog-to-digital converters (ADCs), and all-optical technology is the most promising method to achieve this goal. All-optical ADC involves three basic units and key technologies of optical sampling, optical quantization and optical encoding. Researchers at home and abroad have satisfactorily solved the optical sampling technology. The key to designing an ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F7/00G02F1/35
Inventor 张利勋刘永智刘永李和平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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