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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.


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Patent
Nobuhiko Kikuchi1
07 Jul 1999
TL;DR: In this article, a compensation circuit for polarization mode dispersion, a degree of polarization measuring circuit, and a control circuit are presented, where the compensation circuit generates a control signal based on the degree of the divided optical signal.
Abstract: The present invention offers a polarization mode dispersion compensator and a compensation method for polarization mode dispersion having simple constitution and being strong against external disturbances. The polarization mode dispersion compensator, a representative example of the present invention, is provided with a compensation circuit for polarization mode dispersion, a degree of polarization measuring circuit, and a control circuit. An optical signal is input to the compensation circuit for polarization mode dispersion through an optical fiber, and after the process of compensation for polarization mode dispersion, it is output to an optical fiber. An optical coupler divides a part of the optical signal passing through the optical fiber. The degree of polarization measuring circuit finds the degree of polarization of the divided optical signal. The control circuit generates a control signal based on the degree of polarization obtained in the above, and so controls the compensation circuit for polarization mode dispersion as to make the degree of polarization maximum.

31 citations

Journal ArticleDOI
William Shieh1
TL;DR: In this article, a second-order PMD approximation based on the pulsewidth distortion has been studied, and it is shown that a complete secondorder approximation should include the second derivative of the PR-ID vector as well as the first derivative of PMD vector.
Abstract: A second-order polarization mode dispersion (PMD) approximation based upon the pulse-width distortion has been studied. It shows that a complete second-order approximation should include the second derivative of the PR-ID vector as well as the first derivative of the PMD vector. Second-order pulse distortions are explicitly expressed including a 'first-order' term involving principal states of polarization (PSP) of the pulse and a second-order term involving the beating between fiber chromatic dispersion and effective PMD chromatic dispersion. An analytical result is derived for the probability of second-order PR-ID power penalty. It shows that the mean PMD of the fiber should be restricted to 26 ps and 18 ps, respectively for an optical link with zero and 850 ps/nm chromatic dispersion, in order to maintain a one dB second-order PMD power penalty with a probability below 10/sup -6/ at a data rate of 10 Gb/s. The analysis also indicates that a second-order PMD compensator can be used as a dynamic chromatic dispersion compensator.

31 citations

Proceedings ArticleDOI
20 Jun 2004
TL;DR: The structure of MLSE-based optical receivers operating in the presence of dispersion and amplified spontaneous emission noise is described, and a theory of the error rate of these receivers is developed, and computer simulations show a close agreement between the predictions of the theory and simulation results.
Abstract: In this paper we investigate maximum likelihood sequence estimation (MLSE) receivers operating on intensity modulated direct detection optical channels. Our study focuses on long haul or metro links spanning several hundred kilometers of single mode fiber with optical amplifiers. We describe the structure of MLSE-based optical receivers operating in the presence of dispersion and amplified spontaneous emission (ASE) noise, and we develop a theory of the error rate of these receivers. Computer simulations show a close agreement between the predictions of the theory and simulation results. We also address some important implementation issues. Optical channels suffer from impairments that set them apart from other channels and therefore they need a special investigation. Among these impairments are the facts that the optical channel is nonlinear, and the dominant source of noise is often ASE noise, which is distributed according to a noncentral chi-square probability density function (pdf). Additionally, optical fibers suffer from chromatic and polarization mode dispersion (PMD). Although the use of MLSE in optical channels has been discussed in earlier literature (J. H. Winter and R. D. Githin, Sept. 1990) (H.F. Haunstein et. al., 2001) no detailed analysis of optical receivers using this technique has been reported so far. This motivates the study reported in this paper.

31 citations

Journal ArticleDOI
TL;DR: This work investigates the evolution of the propagation mode and the group velocity dispersion in the taper region and its contribution to the nonlinearity of tapered fibers, which is important for a comprehensive understanding of the light propagation characteristics and the mechanisms supporting the supercontinuum generation in tapered fiber.
Abstract: We investigate the evolution of the propagation mode and the group velocity dispersion in the taper region and analyze its contribution to the nonlinearity of tapered fibers, which is important for a comprehensive understanding of the light propagation characteristics and the mechanisms supporting the supercontinuum generation in tapered fibers.

31 citations

Journal ArticleDOI
TL;DR: In this article, the effects of polarization-mode dispersion on both conventional and dispersion-managed (DM) soliton transmission systems were studied. And the authors showed that the interplay between the dispersive waves and solitons would seriously distort a sequence of pulses and make soliton systems worse than linear systems if all other transmission impairments are neglected.
Abstract: In soliton transmission systems with polarization-mode dispersion (PMD), random birefringence causes solitons to generate dispersive waves, which degrade soliton transmission systems in two aspects. First, the dispersive waves cause solitons to continuously lose energy, thus induce pulse broadening. Second, the dispersive waves interact with other soliton pulses and cause distortion of a sequence of soliton pulses. Both of these effects induce performance degradation of soliton transmission systems. We study these effects of PMD on both conventional and dispersion-managed (DM) soliton transmission systems. We show that, for conventional soliton systems, although single pulse has robustness to PMD, the interplay between the dispersive waves and solitons would seriously distort a sequence of pulses and make soliton systems worse than linear systems if all other transmission impairments are neglected. We also show that DM solitons are more robust to PMD than both conventional solitons and linear systems due to the enhanced nonlinearity and less sensitivity of DM solitons to perturbations. We further point out that soliton collision-induced polarization scattering causes additional timing jitter and system performance penalty in WDM soliton systems.

31 citations


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