Search for dissertations about: "The fiber optics system"
Showing result 6 - 10 of 31 swedish dissertations containing the words The fiber optics system.
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6. Optical Transmission Systems Based on Phase-Sensitive Amplifiers
Abstract : The capacity and reach of today's long-haul fiber optical communication systems is limited by amplifier noise and fiber nonlinearities. Conventional, phase-insensitiveamplifiers (PIAs), have a quantum limited noise figure (NF) of 3 dB at high gain, meaning that with a shot-noise limited input signal the signal-to-noise ratio (SNR)is degraded by at least 3 dB. READ MORE
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7. Spectral Control of Functional Fiber Sources
Abstract : This thesis is based on five projects aimed at spectral control of fiber-based laser architectures. Two of these concern electrically wavelength-tunable laser sources, namely a fiber amplifier system for CO2-monitoring and a novel tunable laser design for flexible pulsed operation. READ MORE
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8. Investigation of New Concepts and Solutions for Silicon Nanophotonics
Abstract : Nowadays, silicon photonics is a widely studied research topic. Its high-index-contrast and compatibility with the complementary metal-oxide-semiconductor technology make it a promising platform for low cost high density integration. READ MORE
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9. Nonlinear intrachannel distortion in high-speed optical transmission systems
Abstract : The Kerr nonlinearity in optical fibres tends to generate signal distortion in dispersion-managed fibre-optic communication systems. Within a wavelength channel, the resulting intrachannel effects are timing jitter, i.e. READ MORE
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10. Fiber-laser-based noise-immune cavity-enhanced optical heterodyne molecular spectrometry
Abstract : Noise-immune cavity-enhanced optical heterodyne molecular spectro-metry (NICE-OHMS) is one of the most sensitive laser-based absorption techniques. The high sensitivity of NICE-OHMS is obtained by a unique combination of cavity enhancement (for increased interaction length with a sample) with frequency modulation spectrometry (for reduction of noise). READ MORE