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 36 for “"dispersion compensation"”.
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Dispersion compensation for reflection holography
Thesis (M.S.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1996.
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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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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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Variational Calculation of Optimum Dispersion Compensation for Nonlinear Dispersive Fibers
… that causes optical pulse broadening is called dispersion, which limits the transmission data rate and distance. The principle nonlinear effect, called self-phase modulation, can also limit the system performance by causing spectral broadening. Hence, to achieve the optimal system performance, …
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Experimental Investigation Of Ultrawideband Wireless Systems: Waveform Generation, Propagation Estimation, And Dispersion Compensation
… One key challenge is the increased multipath dispersion which results because of the fine temporal resolution. The received response consists of different components, which have certain delays and attenuations due to the paths they took in their propagation from the transmitter to the …
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Tune-out Wavelength Measurement and Gyroscope Using Dispersion Compensation in an Atom Interferometer
This Dissertation describes how I used a three nanograting Mach-Zehnder atom beam interferometer to precisely measure a wavelength of light, known as a tune-out wavelength, that causes zero energy shift for an atom. I also describe how such measurements can be remarkably sensitive to rotation …
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All-fiber Spectral Filters based on LP01 - LP11 Mode Coupling and Applications in Wavelength Division Multiplexing and Dispersion Compensation
… which is required in the implementation of dispersion compensation using LP11 mode, is elucidated.
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Photonics Based Techniques for Millimeter-Wave Generation, Transmission, and Multiplexing
… 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 generated …
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Multi slot amplitude coding technique for high speed optical fiber communication system
… 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 line at 10 …
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All-optical processing using cross-phase modulation
… unique wavelength, is then propagated through a dispersion compensation module. The dispersion compensation effectively re-aligns the data in time and so thus, the timing irregularities are removed. The principle of operation was tested using computer simulation before being re-tested in a …
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Analysis and simulation of the Kerr effect in long haul in-line fiber amplifier transmission systems
… The broadened signal spectrum enhances the dispersion effect and consequently increases the inter symbol interference. This distortion is significant when the dispersion is relatively large. U sing erbium doped fiber amplifiers, amplified spontaneous emission (ASE) noise is added to the …
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Linear Analog Front -End Circuits for Fiber -Optic Communication Systems
… gain amplifier is designed for electronic dispersion compensation based 10-Gb/s optical links. The design incorporates tunable emitter degeneration, hence satisfying linearity, bandwidth, and supply voltage requirements. Also, an analog multiplexer provides a wide gain tunability and …
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Long-wave infrared frequency combs based on quantum cascade lasers
… results on the dry-etch technique to incorporate dispersion compensation strucutre and epi-down fabricaiton for high power CW mode QCL device. Formation of comb(-like) regime has been observed in two devices, with the Gires-Tournois Interferometer (GTI) mirror providing dispersion from the rear …
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Acoustic Frequency Domain Reflectometry
… reflectometry. It is particularly suited to dispersion compensation and phase compensation due to the measurement domain being the frequency domain. This work rigorously analyzes, develops, and experimentally demonstrates AFDR, alongside various compensation methods and demodulation …
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Fabrication and applications of fibre Bragg gratings
… addressed. The use of chirped fibre gratings for dispersion compensation and femtosecond chirped pulse amplification is demonstrated. Chirped gratings are used as dispersive elements in modelocked fibre lasers producing ultrashort pulses. A chirped fibre grating Fabry-Perot transmission filter is …
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Generation and characterization of spectrally factorable biphotons
… the spectral content to temporal information via dispersion through a 42-km SMF28 fiber. To characterize the JSD at high spectral resolution and more eciently, we employ a commercially available dispersion compensation module (DCM) with a dispersion equivalent to 100km of standard optical fiber …
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Supplementing Localization Algorithms for Indoor Footsteps
… their applicability to indoor localization. A dispersion compensation tool is experimentally investigated for localization in an instrumented building. A machine learning approach is also explored using a nearest neighbor search. Additionally, a novel instrumentation method is designed based on …
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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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Advanced optical techniques for high capacity transmission
… loop are illustrated. The crucial role of dispersion management in the transmission systems is then considered. Two of the most popular dispersion compensation methods - dispersion compensating fibres and fibre Bragg gratings - are emphasised. A tunable dispersion compensator is fabricated …
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