Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Polarization-mode dispersion"”.
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Deterministic approach to polarization mode dispersion
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
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Electronic Mitigation of Polarization Mode Dispersion
Polarization Mode Dispersion induces polarization dependent propagation. Consequently it generates a multiple imaging of the light pulse carrying the information. Its first order appears as a dual path fading channel of Maxwellian statistics. It results in harmful impairments that prevent the …
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Adaptive polarization mode dispersion equalizers for coherent optical communications systems
Polarization mode dispersion (PMD) arises as a result of the birefringence in optical fibers, due to inherent asymmetries and deformities from external stresses. The spectral components of the input optical pulse propagate with different group velocities. Consequently, pulse duration increases …
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Designs for Zero Polarization-Mode Dispersion And Polarization-Maintaining Fibers
… addresses several aspects pertaining to polarization in optical fibers and optical waveguide devices. In particular, the analysis and design of fibers that maintain polarization over long lengths, provide zero polarization-mode dispersion, and function as polarizers or mode filters are …
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High resolution measurement of telecommunication component polarization mode dispersion by means of quantum interferometry
… characterization, and optimized mitigation of polarization mode dispersion (PMD) in order to deliver optimal performance in fiber-optic communication systems. Telecommunication service providers need their system vendors to match the performance of their platforms to the overall system PMD …
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A system model for the effect of Polarization Mode Dispersion on digital modulated optical signals in single mode fibers
<p>A comprehensive systems model that retains the discrete nature of the output delay distribution in order to accurately characterize the pulse broadening due to Polarization Mode Dispersion (PMD) is developed in this thesis. PMD in optical channels has been a critical factor limiting high-speed …
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Coherent multi-photon interference and compensation of polarization dispersion
… of interferometer states is shared by all two-mode systems-including classical polarization states of a single-mode fiber. We are exploring bire-fringent systems as a possible implementation of nonlinear quantum coupler ideas, but also because of its practical importance in optical …
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High Data Rate Coherent Optical OFDM System for Long-Haul Transmission
… optical fiber restrictions such as chromatic dispersion (CD) and polarization mode dispersion (PMD). Moreover, Integrating the Coherent Optical OFDM with Wavelength Division Multiplexing (WDM) systems will provide the transmission system with a high bandwidth, a significant data rates, and a …
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Optical pulse distortion and manipulation through polarization effects and chromatic dispersion
… which alleviate pulse deterioration due to polarization effects, and utilize large chromatic dispersion for system performance enhancement. We first demonstrate a method of mitigating polarization mode dispersion (PMD) in fiber optic communication systems. PMD has been a known effect for …
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Holey optical fibres for high nonlinearity devices
… losses, high birefringence and high anomalous dispersion at the operating wavelength. The negative impact of anomalous dispersion on the BER performances of a wavelength converter, and the limitations in terms of wavelength tuning range and phase matching of a high dispersion HF, directs our …
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Sub-femtosecond precision timing distribution, synchronization and coherent synthesis of ultrafast lasers
… to first order. In addition, analytical noise models predict 13 as rms resolution, within a 1 MHz bandwidth, for optical pulses consistent with a practical fiber optic timing link. This analysis aids the widespread adoption of the BOC technique for other wavelengths and implementations. …
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DEPLOYED QUANTUM KEY DISTRIBUTION WITH A ROOM-TEMPERATURE TELECOM SINGLE PHOTON SOURCE
Quantum key distribution (QKD) allows distant users to communicate with perfect secrecy based on the principles of quantum physics. Practical QKD in deployed fibers serves as an important part of the future quantum networks. Although Weak Coherent Pulses have achieved impressive key rates as QKD …
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Digital equalization techniques for the compensation of nonlinear impairments in long-haul coherent optical communication systems
… fiber transmission impairments (i.e., Chromatic Dispersion (CD), Polarization Mode Dispersion (PMD), fiber nonlinearities) due to its more compact spectrum and constant envelope compared to on-off keying. Nonetheless, fiber-optic communication systems using DPSK were severely degraded by …