Coherent light generators – Particular resonant cavity – Plural cavities
Patent
1990-05-22
1991-07-16
Gonzalez, Frank
Coherent light generators
Particular resonant cavity
Plural cavities
372 18, 372101, 372108, 35016216, 350167, H01S 3082
Patent
active
050330608
ABSTRACT:
An apparatus for generating a coherent combined laser beam including an array of laser elements for generating a Fresnel diffraction pattern in a plane at a distance D from the laser array, the Fresnel diffraction pattern having a non-uniform phase distribution, D being at least as large as the distance at which the beams generated by the laser array begin to substantially overlap; and an array of phase corrector elements located in the plane for reducing the degree of non-uniformity in the phase distribution; and a partially reflecting mirror for forming a resonant cavity for the laser array.
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patent: 4894840 (1990-01-01), Liau et al.
U.S. Patent Application S.N. 099,307, "High-Efficiency, Multilevel, Diffractive Optical Elements".
U.S. Patent Application S.N. 325,292, "Two-Dimensional Surface-Emitting Laser Array".
F. X. D'Amato et al., "Coherent Operation of an Array of Diode Lasers Using a Spatial Filter in a Talbot Cavity", Appl. Phys. Lett., vol. 55, No. 9, 1989, pp. 816-818.
J. R. Leger et al., "Astigmatic Wavefront Correction of a Gain-Guided Laser Diode Array Using Anamorphic Diffractive Microlenses", SPIE, vol. 884, 1988, pp. 82-89.
J. R. Leger et al., "Binary Optical Elements for Coherent Addition of Laser Diodes", IEEE Lasers and Electro-Optics Society Conference Proceedings, 1988 Leos Annual Meeting, pp. 468-471.
J. R. Leger, "Lateral Mode Control of an AIGaAs Laser Array in a Talbot Cavity", Appl. Phys. Lett., vol. 55, No. 4, 1989, pp. 334-336.
J. R. Leger et al., "Binary-Optics Miniature Talbot Cavities for Laser Beam Addition", Appl. Phys. Lett., vol. 56, No. 1, 1990, pp. 4-6.
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Leger James R.
Swanson Gary J.
Gonzalez Frank
Hansen Galen J.
Massachusetts Institute Technology
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