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Waveguide-optical fiber automatic core adjusting method based on genetic algorithm and device thereof

A genetic algorithm and automatic tuning technology, applied in the field of the waveguide-optical fiber automatic core tuning method and its device based on genetic algorithm, can solve problems such as high technical requirements

Inactive Publication Date: 2008-09-17
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial light adjustment work still needs to be done manually. This work has high technical requirements for the operators and takes tens of minutes or even longer.

Method used

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  • Waveguide-optical fiber automatic core adjusting method based on genetic algorithm and device thereof
  • Waveguide-optical fiber automatic core adjusting method based on genetic algorithm and device thereof
  • Waveguide-optical fiber automatic core adjusting method based on genetic algorithm and device thereof

Examples

Experimental program
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Effect test

Embodiment

[0056] Embodiment - the genetic method automatic core adjustment of fiber-waveguide-fiber system and its result:

[0057] The optical waveguide uses quartz-based SiO produced by NHK Corporation of Japan 2 Buried single-mode strip waveguide, the core cross-sectional size of the waveguide is 8×8μm 2 , The relative refractive index difference Δ = 0.3%, both ends of the plane grinding. A single-mode optical fiber is arranged at the input and output ends, and a refractive index matching liquid is arranged between the end faces. The refractive index of the matching liquid is 1.445 and 1.444 at wavelengths of 1310nm and 1550nm respectively, the refractive index difference with the quartz fiber core is less than 0.01, and the reflection loss is less than -50dB. The transmittances of the matching liquid at wavelengths of 1310nm and 1550nm are 99% / mm and 98% / mm respectively, and the absorption of the matching liquid can be ignored for an end-face gap of about 1 μm. Under the monitori...

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Abstract

This invention discloses a method and an apparatus for automatic regulating core with waveguide optical fiber based on genetic algorism, which is characterized by forming mapping between regulating-core physical parameter and genetic gene model, describing a certain relative place between waveguide optical axis and fibre-optical optical axis when regulating core by individual concept, taking coupling efficiency as adapting function to judge and adjusting constantly the related place between waveguide and optical fiber through generations of genetic manipulation such as selecting regeneration, cross-over, variation according to genetic principle about survival of the fittest until astringing in the optimal coupling place, and adopting up-rush method adjusting four-axis in little neighborhood when realizing the iliofemoral ligament of waveguide and optical fiber is lower than 2dB to find the optimum place between waveguide and optical fiber and finish the process

Description

technical field [0001] The invention relates to the automatic connection technology and packaging technology of fiber-to-fiber matching devices in the field of optical communication, in particular to a waveguide-fiber automatic core adjustment based on genetic algorithm, which is suitable for core adjustment between integrated optical waveguide devices and single-mode optical fibers method and its devices. Background technique [0002] To introduce optical waveguide devices into optical fiber networks, the connection and packaging of optical fibers and optical waveguides must be solved. The key technology is to realize the low-loss connection between optical waveguide devices and optical fibers. At present, the international advanced index is that the loss at each end is less than 0.15dB. To achieve this target, on the one hand, the mode field distribution of the optical waveguide is required to be as consistent as possible with that of the optical fiber; on the other hand,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/38H04B10/12H04B10/25
Inventor 陈抱雪沙慧军陈林
Owner UNIV OF SHANGHAI FOR SCI & TECH
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