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

Abstract

The invention discloses an all-optical analog-to-digital converter 2ASSX parallel quantization coding method; an N-bit analog-to-digital converter is designed to stably detect optical pulses and to control the optical pulses (analog light) to be input into a beam-splitting coupler array [2] through a wavelength division multiplexer or a polarization coupler [1]; the coupler array [2] is formed by that N-1 couplers (1 multiplied by 2) are connected in series, wherein, the output port of each coupler (1 multiplied by 2) is connected with an asymmetrical Sagnac interferometer [3] and the other output port thereof is connected with the next coupler (1 multiplied by 2); a fibre circulator [4] is arranged in front of the reflection output port of each asymmetrical Sagnac interferometer [3]; the output port of the fibre circulator [4] is provided with a band pass filter or an analyser [5] which only allows detecting lights to pass. The structure of the invention combined with suitable coupler array [2] splitting ratio and the coupler splitting ratio of each asymmetrical Sagnac interferometer [3] leads the detecting lights to output optical gray reversed codes in parallel.

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 2ASSX parallel quantization encoding method, that is, N asymmetric Sags using N-1 1×2 couplers connected in series to a beam splitting input array Nanogram interferometer (Asym_SagnacI) 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 the...

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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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