Sökning: "self-homodyne"
Hittade 5 avhandlingar innehållade ordet self-homodyne.
1. Self-Homodyne Coherent Systems using Advanced Modulation Formats
Sammanfattning : Modulation formats that offer high spectral efficiency will be of great importance in future fiber optic communication systems. Currently, a lot of research effortsare ongoing to investigate the best ways of generating and detecting modulation formats in which both the phase and the amplitude of the light are used to carry information, such as 16-QAM. LÄS MER
2. Fiber-Optic Systems with Coherent Detection and Four-Dimensional Modulation
Sammanfattning : To increase the data rates of fiber-optic communication systems, modulation formats withhigher spectral efficiency and/or higher power efficiency than binary formats are of greatinterest. These formats require coherent detection and this thesis has been dedicated toinvestigating both novel modulation formats and two different types of coherent systems. LÄS MER
3. Phase-Sensitive Parametric Signal Processing in Optical Communications
Sammanfattning : This thesis covers the analysis of several schemes for parametric processing in fiberoptic communication systems, focusing mainly on phase-sensitive processing. Vector phase-sensitive amplifiers are characterized and phase regeneration of a dualpolarization (DP)-binary phase-shift keying signal (BPSK) signal is experimentally demonstrated. LÄS MER
4. High spectral efficiency transmission using optical frequency combs
Sammanfattning : Modern long-haul optical communication systems transmit data on all available single-mode fiber dimensions, time, polarization, wavelength, phase and amplitude. Powerful digital signal processing and forward error correction has pushed the per-channel throughput towards its theoretical limits and the bandwidth is limited by the erbium-doped fiber amplifiers. LÄS MER
5. High Spectral Efficiency Fiber-Optic Transmission Systems Using Pilot Tones
Sammanfattning : Modern fiber-optic communication systems combine state-of-the-art components with powerful digital signal processing (DSP) to maximize the system spectral efficiency (SE). Systems rely on wavelength-division multiplexing, including superchannel transmission, to enable transmission over the available bandwidth which reaches about 10 THz when accounting for the so-called C and L bands. LÄS MER