Apparatus and method for fiber-laser output-beam shaping for spectral beam combination
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G02B-027/10
G02B-027/09
G02B-019/00
G02B-005/00
G02B-027/30
H01S-003/067
H01S-003/23
H01S-003/00
출원번호
US-0987265
(2014-02-18)
등록번호
US-9366872
(2016-06-14)
발명자
/ 주소
Honea, Eric C.
Hu, Yongdan
출원인 / 주소
Lockheed Martin Corporation
대리인 / 주소
Lemaire, Charles A.
인용정보
피인용 횟수 :
12인용 특허 :
184
초록▼
A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam a
A method and apparatus for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination. This invention includes a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength; a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile; a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; and a spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam.
대표청구항▼
1. A system for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination, the system comprising: a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength;a beam annularizer th
1. A system for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination, the system comprising: a plurality of laser sources that emit a plurality of beamlets, wherein each one of the plurality of beamlets has a different wavelength;a beam annularizer that includes a plurality of optical units arranged to receive the beamlets, and configured to convert each beamlet into a respective annular beam that has an annular cross-sectional power profile;a beam-intersection transform element configured to point each respective one of the plurality of annular beams in an angular intersection arrangement toward a first location; anda spectral beam combiner at the first location configured to combine the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam. 2. The system of claim 1, wherein the first annular combined beam is a collimated beam. 3. The system of claim 2, further comprising: a Cassegrain projector operatively coupled to receive the first annular spectrally combined collimated beam and configured to form a second collimated annular output beam from the optical energy of the first annular combined collimated beam. 4. The system of claim 1, wherein the first annular spectrally combined beam is a diverging annular beam. 5. The system of claim 4, further comprising: a Cassegrain projector operatively coupled to receive the first annular combined diverging beam and configured to form a second collimated annular output beam from the optical energy of the first annular combined diverging beam. 6. The system of claim 1, wherein the plurality of laser sources includes a plurality of optical-fiber lasers. 7. The system of claim 1, further comprising: a mobile vehicle;an electrical power supply mounted to the vehicle;a laser controller mounted to the vehicle and operatively coupled to receive electrical power from the electrical power supply and operably coupled to power and control the plurality of laser sources;a Cassegrain projector mounted to the vehicle and operatively coupled to receive the first annular spectrally combined beam and configured to form a collimated second annular output beam from the optical energy of the first annular spectrally combined beam; anda beam-direction controller operably coupled to the Cassegrain projector and operable to direct the second annular output beam in one of a plurality of different possible directions relative to the vehicle. 8. The system of claim 1, wherein the first annular combined beam is a collimated beam, the system further comprising: a Cassegrain projector operatively coupled to receive the first annular spectrally combined collimated beam and configured to form a second collimated annular output beam from the optical energy of the first annular combined collimated beam, wherein the second collimated annular output beam has a larger-diameter than the first annular spectrally combined collimated beam. 9. The system of claim 1, further comprising: one or more optical elements; andan active positioning control subsystem operably connected to the one or more of the optical elements to position the beams such that light from all the beams is aligned in the output beam. 10. A method for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination, the method comprising: emitting a plurality of laser beamlets from a plurality of laser sources, wherein each one of the plurality of beamlets has a different wavelength;annularizing each of the plurality of beamlets to convert each beamlet into a respective annular beam each having an annular cross-sectional power profile;pointing each respective one of the plurality of annular beams in a angularly intersecting direction toward a first location; andspectral beam combining the intersecting beams at the first location to combine the light of the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam. 11. The method of claim 10, wherein the first annular combined beam is a collimated beam. 12. The method of claim 11, further comprising: providing a Cassegrain projector; andreceiving the first annular combined collimated beam into the Cassegrain projector, and forming, with the Cassegrain projector, a second collimated annular output beam from the optical energy of the first annular combined collimated beam. 13. The method of claim 10, wherein the first annular spectrally combined beam is a diverging annular beam. 14. The method of claim 10, further comprising: providing a mobile vehicle having an enclosure;supplying electrical power from the vehicle;using the electrical power to control and power the plurality of laser sources;providing a Cassegrain projector mounted to the vehicle;receiving the first annular spectrally combined beam into the Cassegrain projector, and forming, with the Cassegrain projector, a collimated second annular output beam from the optical energy of the first annular combined diverging beam; andcontrolling an output direction of the second annular output beam in one of a plurality of different possible directions relative to the vehicle. 15. The method of claim 10, further comprising: astigmatically reshaping the plurality of annular intersecting beams such that a height-to-width ratio of the first annular combined collimated beam is substantially one. 16. A method for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination, the method comprising: emitting a plurality of laser beamlets from a plurality of laser sources, wherein each one of the plurality of beamlets has a different wavelength;annularizing each of the plurality of beamlets to convert each beamlet into a respective annular beam each having an annular cross-sectional power profile;pointing each respective one of the plurality of annular beams in a angularly intersecting direction toward a first location;spectral beam combining the intersecting beams at the first location to combine the light of the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam; andactively positioning one or more optical elements to position the plurality of annular beams such that light from all the annular beams is aligned in the first annular combined collimated beam. 17. A system for combining a plurality of laser beamlets to form a single annular beam using spectral beam combination, the system comprising: means for emitting a plurality of laser beamlets, wherein each one of the plurality of beamlets has a different wavelength;means for annularizing each of the plurality of beamlets to convert each beamlet into a respective annular beam each having an annular cross-sectional power profile;means for pointing each respective one of the plurality of annular beams in a angularly intersecting direction toward a first location; andmeans for spectral beam combining the intersecting beams at the first location to combine the light of the plurality of wavelengths in the plurality of annular beams into a first annular spectrally combined beam. 18. The system of claim 17, further comprising: means for astigmatically reshaping the plurality of annular intersecting beams such that a height-to-width ratio of the first annular combined collimated beam is substantially one. 19. The system of claim 17, wherein the first annular spectrally combined beam is a collimated beam. 20. The system of claim 19, further comprising: a Cassegrain projector; andmeans for receiving the first annular spectrally combined collimated beam into the Cassegrain projector, and forming, with the Cassegrain projector, a collimated second annular output beam from the optical energy of the first annular combined collimated beam. 21. The system of claim 17, wherein the first annular spectrally combined beam is a diverging annular beam. 22. The system of claim 21, further comprising: a mobile vehicle having an enclosure;means for supplying electrical power from the vehicle;means for controlling and powering the means for emitting the plurality of laser beamlets;a Cassegrain projector mounted to the vehicle;means for receiving the first annular spectrally combined beam into the Cassegrain projector, and for forming, with the Cassegrain projector, a collimated second annular output beam from the optical energy of the first annular combined beam; andmeans for controlling an output direction of the second annular output beam in one of a plurality of different possible directions relative to the vehicle.
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