Essays about: "lasers"

Showing result 31 - 35 of 118 essays containing the word lasers.

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

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

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

    Abstract : 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. READ MORE

  3. 32. Heterodyne Detection using Frequency-Modulated Continuous-Wave LiDAR

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Fredrik Johansson; [2020]
    Keywords : lidar; laser; light detection and ranging; heterodyne detection; homodyne detection; Physics and Astronomy;

    Abstract : Light Detection and Ranging (LiDAR) is a technique that can change the way automated systems interact with their environments. The most common LiDAR systems used in industry today are based on the concept of Time-of-Flight (ToF) and utilizes pulsed lasers. READ MORE

  4. 33. Periodic and Non-Periodic Filter Structures in Lasers

    University essay from KTH/Matematik (Avd.)

    Author : Leo Enge; [2020]
    Keywords : Laser; Grating Filters; Perturbation Theory; WKB Approximation; Bi-cubic Splines; Laser; optiska filter; störningsteori; WKB-approximation; bi-kubiska splines;

    Abstract : Communication using fiber optics is an integral part of modern societies and one of the most important parts of this is the grating filter of a laser. In this report we introduce both the periodic and the non-periodic grating filter and discuss how there can be resonance in these structures. READ MORE

  5. 34. Method for coupling modulatedscattered light from free flyinginsects to harmonics and theirrelative phases

    University essay from Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk statistik

    Author : Martin Patricks; Ludvig Anderberg; [2020]
    Keywords : frequency estimation; phase estimation; matched phase reassignment; entomologic lidar; modulation spectroscopy; scattered light; Technology and Engineering;

    Abstract : Using laser it is possible to measure the backscattered light from insects. The resulting signal can then be analysed in order to potentially determine the species of the insect. READ MORE

  6. 35. Dispersion management and characterization of ultrashort laser pulses for the optimization of parametric processes

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Axel Elfving; [2019]
    Keywords : frequency resolved optical gating; optical parametric amplification; difference frequency generation; nonlinear optics; laser pulse compression; lasers; optics; Technology and Engineering; Physics and Astronomy;

    Abstract : This thesis set out to continue the development of a short-wave infrared (SWIR) optical parametric amplifier (OPA). The system is based on a Yb-ber chirped pulse amplification (CPA) laser delivering 400 fs long pulses, centered around 1030 nm, at 200 kHz repetition rate and 40 W average power. READ MORE