Sökning: "Coherent Optical Communication"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Coherent Optical Communication.

  1. 1. Machine Learning Enabled Nonlinear Phase Noise Mitigation for Coherent Optical Systems

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Sergio Steven Gutierrez; [2020]
    Nyckelord :QAM; NLIN; NLPN; Machine Learning; Coherent Optical Communication; Nonlinear Noise Compensation; Physics and Astronomy; Technology and Engineering;

    Sammanfattning : In the current development of coherent optical communication systems, nonlinear noise is considered to be the ultimate bottleneck when extending the transmission length. In this report we suggest a nonparamter digital signal processing scheme to extend the transmission length of a fiber link. LÄS MER

  3. 2. Silicon photonics based MEMS tunable polarization rotator for optical communications

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Sandipan Das; [2016]
    Nyckelord :Silicon photonics; MEMS; Tunable polarization rotator; Polarization beam splitter; Kiselfotonik; MEMS; Flytande polarisationsrotator; polarisationsstr°aldelare;

    Sammanfattning : There has been a huge surge in data traffic all over the world due to the rise of streamingmedia services and connected devices. The current demand in data traffic has alreadypushed the optical fiber in the internet architecture to the network edges and the trend isto push it as close as possible, to the CPU. LÄS MER

  4. 3. Interface Roughness in Quantum Cascade Lasers

    Master-uppsats, Lunds universitet/Matematisk fysik

    Författare :Kasparas Antanas Krivas; [2015]
    Nyckelord :Quantum Cascade Lasers; Interface Roughness; Modeling; Physics and Astronomy;

    Sammanfattning : The quantum cascade laser (QCL) is a solid state device capable of generating the coherent mid-infrared and terahertz radiation. It is made from layers of different semiconducting materials. This layered structure gives rise to sub-bands, that are employed to achieve charge inversion necessary for lasing. LÄS MER

  5. 4. Performance Evaluation and Comparison of Coherent and Incoherent Receivers under Atmospheric Turbulence

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Mohamed Kazaludeen Akbar; [2014]
    Nyckelord :Free-Space Optical Communication FSO ; Signal to Noise Ratio SNR ; Avalanche Photodiode APD ; Probability Density Function PDF ; Cumulative Distribution Function CDF ; Bit Error Rate BER ;

    Sammanfattning : Optical free space communication system faces the major challenge because of the atmospheric condition. Signals receive in the ground station using two different types of receivers (Coherent detection and Intensity Modulation and Direct Detection (IM/DD)). LÄS MER

  7. 5. Performance Analysis and Link Design of Long Haul Coherent Optical OFDM Systems

    Magister-uppsats, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Författare :Ayhan Yazgan; [2011]
    Nyckelord :;

    Sammanfattning : Orthogonal Frequency Division Multiplexing (OFDM) is a suitable solution due to its many advantages known in wireless communications. On the other hand, optical communications is also used as a backbone to transmit and receive large data rates with economical and good performance. LÄS MER