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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0887025 (2010-09-21) |
등록번호 | US-8150271 (2012-04-03) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 366 |
A chirped pulse amplification (CPA) system and method is described wherein the dispersion of the system is tuned by actively tuning one or more system components, for example, using a temperature or strain gradient, or using actinic radiation. In other embodiments, an additional element, such as a m
A chirped pulse amplification (CPA) system and method is described wherein the dispersion of the system is tuned by actively tuning one or more system components, for example, using a temperature or strain gradient, or using actinic radiation. In other embodiments, an additional element, such as a modulator, is added to the CPA system to actively to tune the pulse. A pulse monitor is added to the system to measure an output pulse and provide feedback to one or more active tuning elements.
1. A chirped pulse amplification system, comprising: a pulse generator, configured to generate a laser pulse;a pulse stretcher, configured to generate a stretched pulse from the laser pulse by dispersing it temporally as a function of wavelength;a pulse amplifier, configured to generate an amplified
1. A chirped pulse amplification system, comprising: a pulse generator, configured to generate a laser pulse;a pulse stretcher, configured to generate a stretched pulse from the laser pulse by dispersing it temporally as a function of wavelength;a pulse amplifier, configured to generate an amplified pulse from the stretched pulse; anda pulse compressor comprising a Bragg fiber, configured to generate a compressed pulse from the amplified pulse, wherein the pulse stretcher or the pulse compressor is tunable to control a total group velocity dispersion of the chirped pulsed amplification system. 2. The system of claim 1, wherein the pulse stretcher comprises a fiber Bragg grating. 3. The system of claim 1, wherein the pulse stretcher comprises a dispersion compensating fiber. 4. The system of claim 1, wherein the pulse stretcher comprises a Bragg fiber. 5. The system of claim 1, wherein the pulse stretcher or the pulse compressor further comprises a physical beam configured to apply strain to the pulse stretcher or the pulse compressor. 6. The system of claim 1, wherein the pulse stretcher or the pulse compressor further comprises a heater configured to control dispersion of the pulse stretcher or the pulse compressor. 7. A method, comprising the steps of: generating a laser pulse;amplifying the laser pulse using an optical amplifier, to produce an amplified pulse;compressing the amplified pulse using a pulse compressor comprising a Bragg fiber, to produce a compressed pulse;measuring a temporal width of the compressed pulse; anddynamically tuning total group velocity dispersion of the system to control a temporal width of the compressed pulse responsive to the measured temporal width. 8. The method of claim 7, wherein the generated laser pulse is a chirped pulse. 9. The method of claim 7, wherein the step of dynamically tuning controls at least dispersion and dispersion slope. 10. The method of claim 7, wherein measuring the temporal width of the compressed pulse includes using a power meter or correlator to determine the temporal width of the compressed pulse at a surface where the compressed pulse is delivered. 11. The method of claim 7, wherein the total temporal dispersion is caused by a free-space element, environmental effects, or pulse intensity. 12. The method of claim 7, wherein the step of dynamically tuning is performed using a modulator. 13. The method of claim 7, wherein the step of dynamically tuning is performed using a strain gradient applied to a fiber Bragg grating. 14. The method of claim 7, wherein the step of dynamically tuning is performed using a heat gradient applied to a fiber Bragg grating. 15. The method of claim 7, wherein the step of dynamically tuning is performed by applying heat to a Bragg fiber. 16. The method of claim 7, wherein the step of dynamically tuning is performed by applying strain along a length of a Bragg fiber. 17. The method of claim 7, wherein the step of dynamically tuning is performed using a Bragg fiber or a fiber Bragg grating constructed using photosensitive or photorefractive materials activated by actinic radiation. 18. The method of claim 7, wherein the step of dynamically tuning is performed responsive to the measured temporal width of the compressed pulse in real-time. 19. The method of claim 7, wherein the step of dynamically tuning is performed using a distributed Bragg reflector laser. 20. The method of claim 7, further comprising stretching the laser pulse using a pulse stretcher, to produce a stretched pulse. 21. The method of claim 20, wherein temporal dispersion resulting from the pulse stretcher is tuned to match temporal dispersion resulting from the pulse compressor. 22. The method of claim 20, wherein the step of stretching the laser pulse and the step of dynamically tuning are performed using a Mach-Zehnder modulator. 23. The method of claim 20, wherein the step of stretching the laser pulse is performed using a fiber Bragg grating and the step of compressing the amplified pulse is performed using a Bragg fiber. 24. The method of claim 20, wherein the step of stretching the laser pulse is performed using a dispersion compensating fiber. 25. The method of claim 20, wherein the step of stretching the laser pulse is performed using a Bragg fiber. 26. The method of claim 20, wherein the step of stretching the pulse is performed by changing a chirp of an optical pulse by controlling optical non-linearities through control of pulse intensity. 27. The method of claim 20, wherein the step of stretching the pulse is performed using acousto-optic components including acousto-optic dispersive filters or tunable filters. 28. A system, comprising: a chirped pulse source configured to generate a chirped pulse;an amplifier configured to generate an amplified pulse from the chirped pulse;a compressor configured to generate a compressed pulse from the amplified pulse, the compressor comprising a Bragg fiber;an active tuning element configured to tune a temporal dispersion of the system and control a temporal width of the compressed pulse; anda pulse monitor configured to measure one or more characteristics of the compressed pulse, the active tuning element being responsive to an output of the pulse monitor.
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