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Polarization mode dispersion

About: Polarization mode dispersion is a research topic. Over the lifetime, 5147 publications have been published within this topic receiving 80055 citations. The topic is also known as: PMD.


Papers
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Patent
26 May 1993
TL;DR: In this article, a polarization-independent optical isolator having a structure in which polarization dispersion is virtually eliminated by selecting the thickness and optical axis orientations of birefringent crystalline plates used in the isolator is disclosed.
Abstract: A polarization-independent optical isolator having a structure in which polarization dispersion is virtually eliminated by selecting the thickness and optical axis orientations of birefringent crystalline plates used in the isolator is disclosed. The optical isolator of the present invention employs a combination of birefringent crystalline plates wherein the optical axis orientation of at least one birefringent crystalline plate in the optical isolator is different from the optical axis orientation of the remaining birefringent crystalline plates, and the polarization mode dispersion, which is induced when the beam propagates through the birefringent crystalline plate having a different optical axis orientation, is equal to the dispersion rate of the polarization mode dispersion attributable to the remaining birefringent crystalline plates and in a mutually inverse direction.

31 citations

Journal ArticleDOI
TL;DR: In this article, the dispersion compensation technique using the first higher-order mode in a dual-mode optical fiber, which supports both the fundamental LP/sub 01/ and first higher order LP-sub 11/ modes, was proposed.
Abstract: It is well known that the first higher order mode of optical fibers exhibits large negative waveguide dispersion by operating close to its cutoff wavelength. By using this dispersion, the positive dispersion in conventional 1.3 /spl mu/m zero dispersion optical fibers for 1.55 /spl mu/m signal light can be compensated. In this paper, we focus on the dispersion compensation technique using the first higher order mode in a dual-mode optical fiber, which supports both the fundamental LP/sub 01/ and first higher order LP/sub 11/ modes. Numerical calculations show that the waveguide dispersion of the first higher order mode is very sensitive to the refractive-index profile of optical fibers. In addition, it is demonstrated that a directional coupler composed of a single-mode fiber and a dual-mode fiber operates as a mode converter, which converts the signal light from the LP/sub 01/ mode to the LP/sub 11/ mode.

31 citations

Journal ArticleDOI
TL;DR: In this article, the authors critically analyze extensions of the interferometric technique to lower values and present a new extension which provides a sensitivity of a few femtoseconds.
Abstract: The standard interferometric measurement technique for polarization mode dispersion (PMD) measures the cross correlation of the electromagnetic field at the output of the fiber or optical device under test when a broadband light source is used. The sensitivity (smallest measurable PMD delay) of this technique is limited by the coherence time of the light source. In this contribution, we critically analyze extensions of the interferometric technique to lower values and present a new extension which provides a sensitivity of a few femtoseconds.

31 citations

Patent
Xiang-Dong Cao1
23 Apr 2002
TL;DR: In this paper, the alignment of the received arbitrarily oriented first and second principal states of polarization of the PMD pulses to match fixed orientations of the beam splitter is adjusted.
Abstract: Polarization Mode Dispersion (PMD) causes an optical pulse to be split into two arbitrarily oriented orthogonally polarized PMD pulses with a differential group delay therebetween in an optical transmission line. To compensate for the PMD induced distortion, a polarization controller in a PMD compensator selectively adjusts the aligning of the received arbitrarily oriented first and second principal states of polarization of the PMD pulses to match fixed orientations of predetermined first and second principal states of polarization of a beam splitter. First and second output paths of the beam splitter are coupled to first and second paths of a Mach-Zender interferometer arrangement. The Mach-Zender interferometer arrangement measures the PMD differential delay between the first and second principal states of polarization of the respective first and second PMD optical pulses, and selectively compensates for the measured differential delay. An optical combiner combines output signals from first and second paths of the interferometer arrangement to generate a combined output signal. A control arrangement selectively controls both the compensation for a measured differential delay in the interferometer arrangement in response to at least a portion of the combined output signal from the optical combiner, and selectively controls the adjustment of the aligning of the received arbitrarily oriented first and second polarizations in the polarization controller.

31 citations

Journal ArticleDOI
TL;DR: In this article, a direct comparison of two basically differently working polarization mode dispersion compensation techniques, the first-order compensator working in optical domain and an adjustable transversal filter working in electrical domain, is presented.

31 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202332
202275
202145
202069
201968
201868