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Apparatus for measuring polarization mode dispersion

Imamura Motonori, +1 more
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TLDR
In this article, a polarization mode dispersion-measuring apparatus is used to measure the dispersion at a specific point of an optical transmission line or in a specific transmission path formed of optical fibers.
Abstract: 
PROBLEM TO BE SOLVED: To measure a polarization mode dispersion at a specific point of an optical transmission line or in a specific transmission path formed of optical fibers after laid SOLUTION: A polarization mode dispersion-measuring apparatus 10 brings an optical pulse of a predetermined wavelength into an optical transmission line, and measures an amplitude of a (p) polarization component light and an (s) polarization component light and, a phase difference of the (p) polarization component light and (s) polarization component light on the basis of a return light of a reflecting light and a back scattering light reflected and scattered by each of connection parts 5 and 6 and an optical fiber leading end part 7 At this time, a polarization controller 16 converts a polarization state of the optical pulse brought in the optical fiber to be measured to a first and a second polarization states The polarization mode dispersion-measuring apparatus 10 measures each amplitude value of the (p) polarization component light and (s) polarization component light corresponding to the optical pulses in the first and second polarization states, and each phase difference of the (p) polarization component light and (s) polarization component light, carries out a predetermined operation based on the measured amplitude values and phase differences and calculates a polarization mode dispersion to the optical pulse of the predetermined wavelength

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Patent

Optical fiber polarization mode dispersion measurement method and measurement device

Shoji Tanigawa, +5 more
TL;DR: An optical fiber polarization mode dispersion measurement method as discussed by the authors includes a step of inputting a pulse light subjected to a single rectilinear polarization to an optical fiber to be measured, and then detecting the light intensity as time series data from pulse light generation.
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Polarization mode dispersion distribution measuring method and apparatus for optical fiber

Takeshi Koseki, +1 more
TL;DR: In this paper, an optical pulse having a desired angular frequency and a pulse width emitted from an optical generator was used to measure the polarization characteristics of an optical fiber in a serial connection of a plurality of wavelength plates.
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Device method and program for measuring polarization mode dispersion and recording medium recording the program

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TL;DR: In this paper, a method for measuring the polarization mode dispersion in a case where the incident light is made in line with the orthogonal polarization axes (a p′-polarization axis and an s′ −polarisation axis) is presented.
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Hirata Takaaki, +1 more
TL;DR: In this paper, a light source section for wavelength-sweeping and outputting first and second input lights of which frequencies are different and polarized states are mutually orthogonal is presented.
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Fan Xinyu, +1 more
TL;DR: In this paper, an optical path measuring device uses optical frequency domain reflectometry (OFDR) to measure SOP distribution information, and computes a birefringence distribution in the optical path to be measured 20 on the basis of the SOP information.