High-degree pulse compression and high-coherence supercontinuum generation in a convex dispersion profile

2013 ◽  
Vol 301-302 ◽  
pp. 29-33 ◽  
Author(s):  
Qian Li ◽  
J.Nathan Kutz ◽  
P.K.A. Wai
Keyword(s):  
Pulse Compression ◽  
Supercontinuum Generation ◽  
Dispersion Profile ◽  
High Degree ◽  
High Coherence

scholarly journals Chalcogenide Microstructured Optical Fibers for Mid-Infrared Supercontinuum Generation: Interest, Fabrication, and Applications

2018 ◽  
Vol 8 (9) ◽  
pp. 1637 ◽  
Author(s):  
Yiming Wu ◽  
Marcello Meneghetti ◽  
Johann Troles ◽  
Jean-Luc Adam
Keyword(s):  
Optical Fibers ◽  
Infrared Imaging ◽  
Supercontinuum Generation ◽  
Mid Infrared ◽  
Microstructured Fibers ◽  
Research Fields ◽  
Infrared Spectral ◽  
Purification Methods ◽  
Imaging And Spectroscopy ◽  
High Coherence

The mid-infrared spectral region is of great technical and scientific importance in a variety of research fields and applications. Among these studies, mid-infrared supercontinuum generation has attracted strong interest in the last decade, because of unique properties such as broad wavelength coverage and high coherence, among others. In this paper, the intrinsic optical properties of different types of glasses and fibers are presented. It turns out that microstructured chalcogenide fibers are ideal choices for the generation of mid-infrared supercontinua. The fabrication procedures of chalcogenide microstructured fibers are introduced, including purification methods of the glass, rod synthesis processes, and preform realization techniques. In addition, supercontinua generated in chalcogenide microstructured fibers employing diverse pump sources and configurations are enumerated. Finally, the potential of supercontinua for applications in mid-infrared imaging and spectroscopy is shown.

Design of Digital Pulse Compression System Based on FPGA

2014 ◽  
Vol 1049-1050 ◽  
pp. 1718-1721
Author(s):  
Yan Xin Yu ◽  
Chun Yang Wang ◽  
Yu Chen ◽  
Ke Yang
Keyword(s):  
Pulse Compression ◽  
Radar Signal ◽  
Real Time Processing ◽  
Compression System ◽  
Development Cycle ◽  
Short Development Cycle ◽  
Digital Pulse ◽  
Fast Processing ◽  
Linear Frequency Modulated Signal ◽  
High Degree

Pulse compression technology is one of the key technologies in the field of modern radar signal processing, can effectively solve the contradiction between action distance and resolution. In this paper, a radar digital pulse compression system is designed and implemented based on FPGA with linear frequency modulated signal. The digital pulse compression module is designed using FFT IP core which can be reused in different periods of DPC, respectively performing FFT and IFFT calculation, so that the hardware consumption is saved significantly. Therefore, compared with other systems, the system designed in this paper has the characters of fast processing speed, high degree of modularity, real-time processing and short development cycle.

scholarly journals High Coherence at f and 2f of Mid-Infrared Supercontinuum Generation in Silicon Germanium Waveguides

2020 ◽  
Vol 26 (2) ◽  
pp. 1-8 ◽  
Author(s):  
Milan Sinobad ◽  
Jean-Marc Fedeli ◽  
Christelle Monat ◽  
Christian Grillet ◽  
Alberto Della Torre ◽  
...  
Keyword(s):  
Silicon Germanium ◽  
Supercontinuum Generation ◽  
Mid Infrared ◽  
High Coherence

Modeling of Pulse Propagation Factor Changes in Type II Second Harmonic Generation

2001 ◽  
Vol 6 (2) ◽  
pp. 51-69 ◽  
Author(s):  
A. Kurtinaitis ◽  
A. Dementjev ◽  
F. Ivanauskas
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Pulse Compression ◽  
Pulse Propagation ◽  
Second Harmonic ◽  
Spline Approximation ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Step Method ◽  
High Degree

We describe the simulations of the second harmonic generation of ultrashort laser pulses by numerically solving a system of wave propagation equations. The equations are solved by using a split-step method in twodimensional cyllindrically symmetric space and time coordinates. The diffraction part of a solution uses the Hopscotch type finite-difference scheme on a regular grid. The transport part is solved by using the cubic spline approximation. The obtained numerical results satisfactorily respect energy conservation constraints. The algorithm and program developed make it possible to optimize the process of the second harmonics generation and to identify the conditions where sufficiently high degree of the pulse compression with a relatively low degradation of their quality is achieved.

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