Analysis of two forms of gain nonlinearities on the dynamic response of a laser diode for high frequency applications

1992 ◽  
Vol 139 (4) ◽  
pp. 243 ◽  
Author(s):  
Y.C.A. Wong ◽  
K.A. Shore
Keyword(s):  
Dynamic Response ◽  
Laser Diode ◽  
High Frequency

High frequency thermal modulation of superconducting NbTi thin film by use of laser diode

Cryogenics ◽  
1994 ◽  
Vol 34 (7) ◽  
pp. 597-601 ◽  
Author(s):  
F. Ayela ◽  
J.L. Bret ◽  
J. Chaussy
Keyword(s):  
Thin Film ◽  
Laser Diode ◽  
High Frequency ◽  
Thermal Modulation

Dynamic response of long optical-cavity laser diode for Ka-band communication satellites

1997 ◽  
Vol 45 (8) ◽  
pp. 1288-1295 ◽  
Author(s):  
A.S. Daryoush ◽  
K. Sato ◽  
K. Horikawa ◽  
H. Ogawa
Keyword(s):  
Dynamic Response ◽  
Laser Diode ◽  
Optical Cavity ◽  
Ka Band ◽  
Cavity Laser

Pulse laser diode modules for high-power, high-frequency operation

2020 ◽  
Author(s):  
Dmitrii Veselov ◽  
Yulia Bobretsova ◽  
Aleksandr Klimov ◽  
Aleksandr Bondarev ◽  
Andrey Lyutetskiy ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Laser Diode ◽  
High Power ◽  
High Frequency ◽  
High Frequency Operation

scholarly journals Two-Phase Resonant Converter to Drive High-Power LED Lamps

Electronics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 53 ◽  
Author(s):  
Christian Brañas ◽  
Rosario Casanueva ◽  
Francisco J. Díaz ◽  
Francisco J. Azcondo
Keyword(s):  
Dynamic Response ◽  
High Power ◽  
High Frequency ◽  
Pulsed Current ◽  
Resonant Converter ◽  
Two Phase ◽  
Street Lighting ◽  
Spice Model ◽  
Flicker Effect ◽  
Output Filter

This paper presents the design and modeling of a two-phase resonant converter that drives a LED lamp with a high-frequency pulsed current free of instabilities and flicker effect, fulfilling the recommendations of the IEEE PAR 1789-2015, so that it enables visible light-based communication at a 10 kB/s bit rate. The dynamic study of the converter takes into consideration the effect of the reflected impedance of the output filter on the AC side. In order to evaluate the dynamic response of the converter, a Spice model is defined. A 120 W prototype intended for street lighting applications has been built to validate the analysis and modeling.

Lateral Vibration of Offshore Piles Considering Pile-Water Interaction

2019 ◽  
Vol 19 (12) ◽  
pp. 1950147 ◽  
Author(s):  
Peng Fu ◽  
Kanghe Xie
Keyword(s):  
Dynamic Response ◽  
High Frequency ◽  
Hydrodynamic Force ◽  
Hydrodynamic Pressure ◽  
Frequency Range ◽  
Water Interaction ◽  
Dynamic Impedance ◽  
Separation Of Variable ◽  
Soil Interface ◽  
Offshore Piles

The dynamic response of an offshore pile in saturated soil subjected to lateral harmonic loading is theoretically investigated by considering the dynamic pile-water interaction. The governing equation of water is solved based on the separation of variable method, and the analytical expression of the hydrodynamic force applied on the pile is then obtained. Based on the continuous conditions at the pile-soil interface and pile-water interface, the analytical solution of the dynamic impedance of the offshore pile is derived by using transfer matrix method. To verify this solution, the dynamic impedance obtained for a cylinder in water is compared with that of a partially embedded pile. Based on this solution, the effect of hydrodynamic pressure and other parameters on the dynamic response of offshore piles is investigated. The results show that the analytical model ignoring the hydrodynamic force applied on the pile misestimates the impedance of the pile in the high frequency range.

Jitter Transmission Analysis and Experimental Research for Frame Structure in the Median and High Frequency Regions

2012 ◽  
Vol 271-272 ◽  
pp. 981-985
Author(s):  
You Yi Wang ◽  
Yang Zhao ◽  
Wen Lai Ma
Keyword(s):  
Dynamic Response ◽  
Frequency Response ◽  
Dynamic Model ◽  
Experimental Research ◽  
High Frequency ◽  
Low Frequency ◽  
Frame Structure ◽  
Wave Method ◽  
Simulation Results ◽  
Theoretical Results

Frame structure is widely used in practical projects. For jitter of the frame structure excited by median and high frequency disturbances, firstly, the dynamic model of thin plate substructure is built by wave method, and then the dynamic model of frame structure is established by combining wave method and substructure technique. At last, the accurate dynamic response was obtained. The simulation of dynamic characteristic is made, and simulation results are compared with FEM results. On this basis, modal experiment and frequency response experiment is done to verify theoretical results. In comparison to FEM, the results by wave method are accurate in low frequency regions, and the results are more accurate in the median and high frequency regions. The experiment proves wave method is correct and effective for jitter transmission analysis of frame structure in the median and high frequency regions.

High frequency modulation of a 422 nm GaN laser diode

2013 ◽  
Author(s):  
Scott Watson ◽  
Mingming Tan ◽  
Stephen P. Najda ◽  
Piotr Perlin ◽  
Mike Leszczynski ◽  
...  
Keyword(s):  
Laser Diode ◽  
Frequency Modulation ◽  
High Frequency

High-Frequency Dynamic Model of a Pre-Loaded Circular Dielectric Electro-Active Polymer Actuator

2013 ◽  
Author(s):  
Micah Hodgins ◽  
Gianluca Rizzello ◽  
Alex York ◽  
Stefan Seelecke
Keyword(s):  
Dynamic Response ◽  
Dynamic Model ◽  
High Frequency ◽  
Natural Frequencies ◽  
Mechanical Coupling ◽  
Polymer Actuator ◽  
Validation Tests ◽  
Future Work ◽  
Force Displacement ◽  
Good Agreement

In this work a high-frequency dynamic model of a pre-loaded circular DEAP actuator is developed and experimentally validated. The model is capable of predicting both the static and dynamic response of the actuator. The static response is modeled based on a free energy approach and consists of an Ogden term representing the elastic energy, and a electrical term representing the electrical-mechanical coupling [1]. The addition of viscoelastic elements (spring-dashpot configurations) enables the model to capture the dynamic response. The Ogden coefficients were first identified through a quasi-static force-displacement test of the actuator. A series of validation tests of the actuator at various pre-loads and voltage frequencies showed the model to be in good agreement with the experiments. The model is shown to accurately predict the actuators observed natural frequencies as the pre-deflection and the stiffness of the spring were changed. Future work will include additions to the model to account for relaxation and creep inherent in DEAP material.

Bernstein-Be´zier Harmonics and Their Application to Robot Trajectory Synthesis With Minimal Vibrational Excitation

1996 ◽  
Vol 118 (4) ◽  
pp. 509-514 ◽  
Author(s):  
Q. J. Ge ◽  
J. Rastegar
Keyword(s):  
Dynamic Response ◽  
High Frequency ◽  
High Speed ◽  
Inverse Dynamics ◽  
Robot Manipulator ◽  
Vibrational Excitation ◽  
Significant Source ◽  
Polynomial Curves ◽  
Robot Trajectory

For a given high-speed machinery, a significant source of the internally induced vibrational excitation is the presence of high frequency harmonics in the trajectories that the system is forced to follow. This paper presents a Bernstein-Be´zier form of harmonic trajectory patterns for synthesizing low-harmonic trajectories. Similar to Bernstein-Be´zier polynomial curves, Bernstein-Be´zier harmonic trajectories can be defined either explicitly using Bernstein-Be´zier basis harmonics or recursively using the harmonic deCasteljau algorithm. The second part of the paper demonstrates how a Bernstein-Be´zier trajectory can be combined with the inverse dynamics of a robot manipulator for synthesizing a joint trajectory that demands “minimal” dynamic response from its actuators. An example involving a planar 2R robot is also presented.

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