A theory for optical wavelength control in short pulse free electron laser oscillators
Approved for public release; distribution is unlimited. === The future safety of the U.S. Navy warship depends on the development of a directed energy self-defense system to keep pace with the ever-improving technology of anti-ship missiles. Two candidates are reviewed. The free electron laser (FEL)...
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Monterey, California. Naval Postgraduate School
2014
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ndltd-nps.edu-oai-calhoun.nps.edu-10945-398572015-01-26T15:55:58Z A theory for optical wavelength control in short pulse free electron laser oscillators Wilkenson, Wade F. Colson, William B. Amstead, Robert L. Naval Postgraduate School (U.S.) Department of Physics Approved for public release; distribution is unlimited. The future safety of the U.S. Navy warship depends on the development of a directed energy self-defense system to keep pace with the ever-improving technology of anti-ship missiles. Two candidates are reviewed. The free electron laser (FEL) has the most advantages, but a chemical laser proposed by TRW is ready for installation on existing ships. Initial testing of issues related to directed energy use at sea can be conducted with the chemical laser. When the technology of the FEL matures, it can replace the chemical laser to provide the best possible defense in the shortest period of time. Continuous tunability is a key advantage of the FEL over the conventional laser. But since the output wavelength is dependent on electron energy. It is subject to random fluctuations originating from the beam source. At the Stanford University Superconducting (SCA) Free Electron Laser (FEL) Facility, the effects are minimized through negative feedback by changing the input electron energy proportional to the observed wavelength drift. The process is simulated by modifying a short pulse FEL numerical program to allow the resonant wavelength to vary over many passes. The physical effects behind optical wavelength control are explained. A theory for the preferential nature of the FEL to follow the resonant wavelength from longer to shorter wavelengths is presented. Finally, the response of the FEL to a rapidly changing resonant wavelength is displayed as a transfer function for the system. 2014-03-26T23:23:35Z 2014-03-26T23:23:35Z 1993-06 Thesis http://hdl.handle.net/10945/39857 en_US This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, it may not be copyrighted. Monterey, California. Naval Postgraduate School |
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Approved for public release; distribution is unlimited. === The future safety of the U.S. Navy warship depends on the development of a directed energy self-defense system to keep pace with the ever-improving technology of anti-ship missiles. Two candidates are reviewed. The free electron laser (FEL) has the most advantages, but a chemical laser proposed by TRW is ready for installation on existing ships. Initial testing of issues related to directed energy use at sea can be conducted with the chemical laser. When the technology of the FEL matures, it can replace the chemical laser to provide the best possible defense in the shortest period of time. Continuous tunability is a key advantage of the FEL over the conventional laser. But since the output wavelength is dependent on electron energy. It is subject to random fluctuations originating from the beam source. At the Stanford University Superconducting (SCA) Free Electron Laser (FEL) Facility, the effects are minimized through negative feedback by changing the input electron energy proportional to the observed wavelength drift. The process is simulated by modifying a short pulse FEL numerical program to allow the resonant wavelength to vary over many passes. The physical effects behind optical wavelength control are explained. A theory for the preferential nature of the FEL to follow the resonant wavelength from longer to shorter wavelengths is presented. Finally, the response of the FEL to a rapidly changing resonant wavelength is displayed as a transfer function for the system. |
author2 |
Colson, William B. |
author_facet |
Colson, William B. Wilkenson, Wade F. |
author |
Wilkenson, Wade F. |
spellingShingle |
Wilkenson, Wade F. A theory for optical wavelength control in short pulse free electron laser oscillators |
author_sort |
Wilkenson, Wade F. |
title |
A theory for optical wavelength control in short pulse free electron laser oscillators |
title_short |
A theory for optical wavelength control in short pulse free electron laser oscillators |
title_full |
A theory for optical wavelength control in short pulse free electron laser oscillators |
title_fullStr |
A theory for optical wavelength control in short pulse free electron laser oscillators |
title_full_unstemmed |
A theory for optical wavelength control in short pulse free electron laser oscillators |
title_sort |
theory for optical wavelength control in short pulse free electron laser oscillators |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
2014 |
url |
http://hdl.handle.net/10945/39857 |
work_keys_str_mv |
AT wilkensonwadef atheoryforopticalwavelengthcontrolinshortpulsefreeelectronlaseroscillators AT wilkensonwadef theoryforopticalwavelengthcontrolinshortpulsefreeelectronlaseroscillators |
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