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

A digital converter, optical-mode technology, applied in the field of optical information processing, can solve the problem that the peak power does not reach the best utilization rate

Inactive Publication Date: 2008-10-22
UNIV OF ELECTRONIC 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

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  • All-light analog-digital converter 2AMSX parallel quantitative coding method
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  • All-light analog-digital converter 2AMSX parallel quantitative coding method

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[0039] specific implementation

[0040] 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.

[0041] refer to image 3 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, duty cycle b=(100-1.136) / 100=0.98864, average power P 0 = 2mW. The...

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Abstract

The invention discloses a 2ASSX 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 couplers (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 Michelson interferometer (3) and the other output port of each 1x2 coupler is connected with the next 1x2 coupler; an optical fiber microwave circulator or an isolator (4) is arranged on the front of a reflecting port of each asymmetric Michelson interferometer (3); and a transmission port is provided with a band-pass filter or an analyzer (5) which only allows probe light to pass. The structure is combined with adequate splitting ratio of the coupler array (2) and the splitting ratios of couplers of each asymmetric Michelson 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 2AMSX parallel quantization encoding method, that is, N asymmetric Michaels with N-1 1×2 couplers connected in series to a beam splitting input array Sun interferometer (Asym_MichelsonI) parallel output, based on self-phase modulation (SPM) and cross-phase modulation (XPM) 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 th...

Claims

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Application Information

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IPC IPC(8): G02F7/00G02F1/35
Inventor 张利勋刘永智刘永李和平
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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