High power broadband frequency modulation of high Q resonators

1968 ◽  
Vol 61 (2) ◽  
pp. 134-140
Author(s):  
K.R. Mackenzie
Keyword(s):  
High Power ◽  
Frequency Modulation ◽  
High Q ◽  
Broadband Frequency

Correlation of Temporal Profile and Spectrum for Small Broadband Frequency Modulation Pulse in High Power Laser Facility

2017 ◽  
Vol 54 (10) ◽  
pp. 101405
Author(s):  
李 磊 Li Lei ◽  
张 波 Zhang Bo ◽  
夏彦文 Xia Yanwen ◽  
彭志涛 Peng Zhitao ◽  
董 军 Dong Jun ◽  
...  
Keyword(s):  
High Power ◽  
Frequency Modulation ◽  
High Power Laser ◽  
Power Laser ◽  
Temporal Profile ◽  
Laser Facility ◽  
Broadband Frequency

Dielectric-loaded L-band filters for high-power space applications

2021 ◽  
pp. 1-11
Author(s):  
Paolo Vallerotonda ◽  
Fabrizio Cacciamani ◽  
Luca Pelliccia ◽  
Alessandro Cazzorla ◽  
Davide Tiradossi ◽  
...  
Keyword(s):  
High Power ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Rf Power ◽  
Space Applications ◽  
High Q ◽  
Critical Issues ◽  
L Band ◽  
Multipactor Discharge ◽  
Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

Temporal Profile Measurement of Frequency Modulation Beams for High Power Laser Facility

2013 ◽  
Vol 40 (11) ◽  
pp. 1102009
Author(s):  
孙志红 Sun Zhihong ◽  
董军 Dong Jun ◽  
夏彦文 Xia Yanwen ◽  
吕嘉坤 Lü Jiakun ◽  
彭志涛 Peng Zhitao ◽  
...  
Keyword(s):  
High Power ◽  
Frequency Modulation ◽  
Profile Measurement ◽  
High Power Laser ◽  
Power Laser ◽  
Temporal Profile ◽  
Laser Facility

scholarly journals Suppression of Frequency Modulation to Amplitude Modulation Conversion with Modified Group Velocity Dispersion Compensation Device in the Front End of High-Power Lasers

2022 ◽  
Vol 12 (2) ◽  
pp. 884
Author(s):  
Xinlei Qian ◽  
Xiaochao Wang ◽  
Xinghua Lu ◽  
Tianyu Zhang ◽  
Wei Fan
Keyword(s):  
Group Velocity ◽  
High Power ◽  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Velocity Dispersion ◽  
Group Velocity Dispersion ◽  
Experimental Results ◽  
High Power Lasers ◽  
Front End ◽  
Compensation Device

The group velocity dispersion (GVD) occurring in the front end of high-power lasers is one of the primary factors leading to the conversion of frequency modulation (FM) to amplitude modulation (AM). In this paper, we propose a modified, active, closed-loop feedback compensation device for GVD-induced FM–AM conversion, using a two-dimensional, electric, adjustable mirror mount and parallel grating pair to improve the long-term stability, efficiency of adjustment, and accuracy of compensation. Experimental results of a 12 h FM–AM depth test revealed that the depth varied between 2.28% and 5.22%. Moreover, we formulated a mathematical relationship between the dispersion parameters and temperature in optical fibers to analyze the intrinsic effect of temperature on FM–AM. The related simulation and experimental results consistently validated the quantitative relationship between the temperature and FM–AM depth.

scholarly journals Out‐of‐band emission modelling of high‐power pulse linear frequency modulation radar

2020 ◽  
Vol 14 (3) ◽  
pp. 477-486
Author(s):  
Kui Zhao ◽  
Fangmin He ◽  
Jin Meng ◽  
Lei Zhang ◽  
Qing Wang ◽  
...  
Keyword(s):  
High Power ◽  
Frequency Modulation ◽  
Linear Frequency Modulation ◽  
Linear Frequency ◽  
Power Pulse ◽  
Band Emission ◽  
Emission Modelling ◽  
High Power Pulse
Sign in / Sign up

Export Citation Format

Share Document