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 20 of 28 for “"Chromatic Dispersion"”.
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Chromatic dispersion compensation using a Virtually Imaged Phased Array (VIPA)
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Time domain chromatic dispersion measurements in single mode optical fibers
A time domain chromatic dispersion measurement system for single-mode optical fibers is presented for easy measurements in both the laboratory and the field. This technique uses a relative group delay of a band of light at slightly different wavelengths from a single pulsed laser diode to determine …
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Optical pulse distortion and manipulation through polarization effects and chromatic dispersion
… 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 over a decade. However, it was not an …
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Chromatic dispersion measurement in single-mode optical fibers by acousto-optic modulation and phase detection
A system to measure chromatic dispersion in single-mode optical fibers with near point wavelength resolution is described. Differential propagation constant data for the test fiber is collected by using an acousto-optic modulator to frequency-shift laser light passed to an optical heterodyne. …
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Analysis and design of broadband single-mode multi-clad fibers
… attention has been paid to the study of dispersion-flattened single-mode fibers which offer a high transmission capacity with low losses through a wide range of wavelengths. However, the existing designs are sensitive to bending and manufacturing tolerances, and are not truly single-mode …
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The impact of WH/TS codes in implementing incoherent OCDMA system
… I investigated, including the influence of chromatic dispersion, timing jitter and the effect of ambient temperature fluctuations on data transmission over a 17-km bidirectional fibre link (a testbed) I designed between Strathclyde and Glasgow University. The OCDMA system is based on …
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Multi-impairment and multi-channel optical performance monitoring
… conversions. When considering impairments due to chromatic dispersion in dynamic networks, each channel will traverse a unique path through the network thus the channels arriving at the monitoring point will, in general, exhibit different amounts of residual dispersion. Therefore, in a dynamic …
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Photonics Based Techniques for Millimeter-Wave Generation, Transmission, and Multiplexing
… and compared to each other. Also, the effect of chromatic dispersion is discussed in addition to the phase conjugation way of dispersion compensation. Dispersion compensation based on phase conjugation was also simulated and applied to OSSB millimeter-wave generator in order to transmit the …
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Nonlinear Interferometers for Quantum Information Processing and Metrology
… utilize our NLI scheme to perform a precision dispersion measurement as well. First, I developed a comprehensive model, which accounts for the effects of the pump temporal coherence, as well as the chromatic dispersion and the birefringence of the linear medium inside the NLI. I have shown that …
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All-optical processing for terabit/s wavelength division multiplexed systems using two-photon absorption in a semiconductor micro-cavity
… frequent and expensive signal regeneration. Chromatic dispersion, considered as one of the main limiting factors, has to be mitigated in order to achieve satisfactory system performance. Continuous monitoring and adaptive compensation of accumulated dispersion fluctuations within a …
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Development of non-linear waveguide devices for optical signal processing
… are possible in glass fibres, owing to the lower chromatic dispersion. -gratings in fibres. This technology led to the first demonstration of an all-fibre frequency doubler of a fibre laser. Milliwatts of red light in the fundamental mode were produced by frequency doubling in a quasi-phase …
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Second harmonic generation in novel optical waveguides
… and controllable optical properties such as chromatic dispersion despite low second order nonlinearity. Given such benefits, the numerical modelling and analysis of optical waveguides accurately and efficiently has become vital for the advancement of nonlinear optics. Hence, this thesis …
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Integrated silicon photonic circuit simulation
… for handling more special cases, such as chromatic dispersion in the waveguide, and non-ideal optoelectronic devices. Finally, we demonstrate simulations of complicated systems such as WDM links and Pound-Drever-Hall loops. This will allow designers to unify our photonic device designing …
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The application of SOA for dispersion management of 2D-WH/TS codesin incoherent OCDMA system
… data rate optical fibre communication networks, dispersion phenomenon plays a pivotal role. It is important to investigate the dispersion effects in a multi-wavelength picosecond optical code division multiple access (OCDMA) system. This research is focused on the analysis of the effects of fibre …
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All-optical interferometric switches for data regeneration in fiber optic networks
… through the glass of optical fiber become worse. Chromatic dispersion causes the temporal broadening of optical bits during propagation, leading to interference between neighboring bits. Nonlinear effects, like the nonlinear index of refraction and four-wave mixing, can cause interference between …
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Multi slot amplitude coding technique for high speed optical fiber communication system
… by around 25%, not less than 55% improvement of chromatic dispersion (CD) tolerance, 0.6 dB better RS, and 1.5 dB better OSNR. The spectral width for 310 Gbit/s, 410 Gbit/s and 510 Gbit/s MSAC is 60 GHz, which indicates improvement of spectral efficiency. Optical spectrum of MSAC has spectral …
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Burst-mode electronic dispersion compensation in long reach PONs
… for such long reaches at 10Gb/s, and hence dispersion compensation is required. In this thesis electronic dispersion compensation (EDC) techniques are employed to increase the chromatic dispersion tolerance and to enhance the system performance at the expense of moderate additional …
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High Data Rate Coherent Optical OFDM System for Long-Haul Transmission
… overcome many 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 …
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Photonic neural networks for signal equalization in optical fiber transmission
… This design is experimentally tested against Chromatic Dispersion and Self-Phase modulation in 10 Gbaud Pulse amplitude-modulated signals. The training is performed offline by maximizing the eye diagram aperture, verifying the equalization in single- and multi-span links. Simulations allowed …
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