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Complete optical A/D converter, NAMSX paralleling quantification coding method

A digital converter and coding method technology, applied in the field of optical information processing, can solve the problem that the peak power does not reach the best utilization rate, etc.

Inactive Publication Date: 2008-10-08
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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  • Complete optical A/D converter, NAMSX paralleling quantification coding method
  • Complete optical A/D converter, NAMSX paralleling quantification coding method
  • Complete optical A/D converter, NAMSX paralleling quantification coding method

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[0037] specific implementation

[0038] 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.

[0039] 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 full-optical analog-digital converter NAMSX parallel quantizing coding method, which designs a N-bit analog-digital converter: a stable detection optical pulse and a control optical pulse (an analog light) input 1XN couplers [2] light splitting via a wavelength division multiplexer or a polarization coupler [1] and then input N asymmetrical Michelson interferometers [3]; each asymmetrical Michelson interferometer [3] is provided with a fibre circulator [4] at a reflection hole thereof; a pass filter or an analyzer (5) is provided at a transmission output hole to only permit the detection light to get through. The above structure with proper coupler [2] light splitting ratio and the coupler light splitting ratio of each asymmetrical Michelson interferometer enables the detection light to output light Grey complement code.

Description

technical field [0001] The present invention relates to the technical field of optical information processing, and it particularly relates to an all-optical analog-to-digital converter NAMSX parallel quantization encoding method, that is, a 1×N coupler is used to split the beam and access N asymmetric Michelson interferometers (Asym_MichelsonI) in parallel Output, an N-bit all-optical analog-to-digital converter based on parallel quantization coding based on self-phase modulation (SPM) and cross-phase modulation (XPM) principles. 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...

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Application Information

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