Method for reducing indeterminacy in chromatic dispersion test of optical fiber polarization film

A polarization mode dispersion and deterministic technology, applied in the field of optical communication, can solve problems such as large differences, and achieve the effect of high PMD test accuracy

Active Publication Date: 2008-12-17
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

However, at different times, different temperatures and different optical fiber placement conditions, two consecutive tests may obtain very different results, so which test result is more effective, and how to obtain test data with lower uncertainty , and then it becomes a very important technical issue to accurately guide the relevant links of optical communication

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  • Method for reducing indeterminacy in chromatic dispersion test of optical fiber polarization film
  • Method for reducing indeterminacy in chromatic dispersion test of optical fiber polarization film
  • Method for reducing indeterminacy in chromatic dispersion test of optical fiber polarization film

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[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] In the process of actual parameter testing, in order to ensure the stability of the test, it is generally required to place the optical fiber stably and perform wavelength or time averaging. However, since the change of PMD changes slowly with time, in most cases, only the wavelength is averaged. Apparently, polarization mode dispersion changes randomly with time, temperature, wavelength, and placement state, but in essence, these factors are affected by the optical fiber geometry, strain, symmetry of the refractive index distribution, and bending. It is generated by the normal mode splitting of the optical signal and its coupling relationship. In layman's terms, the change of the polarization state of the optical signal in the optical fiber causes the PMD to change randomly. In addition to understanding the performance of PMD paramet...

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Abstract

A method for reducing the uncertainty in the optical fiber polarization film dispersion test is provided, wherein a polarization disturbance controller is added between an input end and/or an output end of the optical fiber to be tested with the test device, for controlling the inputting and/or outputting polarization state of the optical fiber. According to the method, the polarization disturbance controller is controlled in a plurality of times of optical fiber polarization film dispersion test, causing the output polarization state and/or the input polarization state in plurality of times of test distributed uniformly on the polarization state poincare sphere, and the arithmetic mean or the root mean square average computation of each testing result is performed according to the types of the result limited by the specific testing principle of the tester, to obtain the polarization film dispersion testing value with high precision.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a method for reducing uncertainty in optical fiber polarization mode dispersion testing. Background technique [0002] With the advancement of technology, the transmission distance and transmission rate of optical communication have increased rapidly, and the limitations of line attenuation and wavelength dispersion on transmission performance have been gradually solved through optical amplification and dispersion compensation technology, but polarization mode dispersion (PMD, Polarization Mode Dispersion) ) There is still no good solution to the limitation of transmission performance. When an optical signal is injected into a single-mode fiber for transmission, due to the difference in fiber size and refractive index symmetry, the change of side pressure, and the bending of the fiber, the single-mode transmitted optical signal will split into two orthogonal polarizations wit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04B10/079H04B10/2569
Inventor 雷非刘骋陈永涛
Owner FENGHUO COMM SCI & TECH CO LTD
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