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 7 of 7 for “"few-mode fibers"”.
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Characterization of Optical Coupling and Back-reflection of Few Mode Fibers
… communications industry has caused interest in mode-division multiplexing (MDM) techniques to flourish in recent years. These techniques allow individual waveguide modes to be used as distinct channels. However, as with any versatile technique, it should be also useful and beneficial to extend …
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Investigation of Bragg Gratings in Few-Mode Fibers with a Femtosecond Laser Point-by-Point Technique
The higher-order modes (HOMs) of an optical fiber has been demonstrated as a new dimension to transmitting signals with the development of mode-division multiplexing (MDM) technique. This dissertation aims to explore the HOMs as an extra degree of freedom for device innovation. In particular, with …
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Robust Data Center Network Design using Space Division Multiplexing
… Space Division Multiplexing using multi-core fibers (MCFs), and few-mode fibers (FMFs) has been studied in our work to enhance the data-carrying capacity of optical fibers while minimizing the transmission cost per bit. The objective of our work is to develop a path protection scheme to handle …
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Adaptive Mode Control in Few-Mode and Highly Multimode Fibers
Few-mode fibers (FMFs) and multimode fibers (MMFs) can provide much higher data-carrying capacities compared with single-mode fibers. But in order to achieve this goal, one must address the challenge of intermodal coupling and dispersion. Therefore the ability to accurately control the optical …
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Non-Binary Coded Modulation for FMF-Based Coherent Optical Transport Networks
The Internet has fundamentally changed the way of modern communication. Current trends indicate that high-capacity demands are not going to be saturated anytime soon. From Shannon's theory, we know that information capacity is a logarithmic function of signal-to-noise ratio (SNR), but a linear …
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Adaptive Control of Waveguide Modes in Two-Mode Fibers
Few mode fibers and multimode fibers (MMFs) are traditionally regarded as unsuitable for important applications such as communications and sensing. A major challenge in using MMFs for aforementioned applications is how to precisely control the waveguide modes propagating within MMFs. In this …
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Digital equalization techniques for the compensation of nonlinear impairments in long-haul coherent optical communication systems
… (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 nonlinear phase noise. One way to …