Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1978-11-13
1981-04-28
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
331 945T, 350174, H01S 3101
Patent
active
042648696
ABSTRACT:
A long pulse laser amplifier is sequentially lased over a 0.5 microsecond period by an additive group of temporarily spaced discrete lasing colors (frequencies) each of slightly different color (approximately 1/10 of an Angstrom separation with less than 1/1000 angstrom band width). An oscillator array generates the actuating pulses which are channelled to common optical path, amplified by a factor of 10.sup.4 and split up and shaped before injection into approximately 10 final amplifiers. Each final amplifier is preceded by a chromatic deflector, preferably a diffraction grating so that each short pulse (in the order of about 10.sup.-8 seconds) is sent through the amplifier at slightly different directions. These differently directed pulses are amplified and individually address a mirror array placed at some distance away. Due to the narrow band width of each pulse, each address point is unique; there is no overlapping. As a result, the distance from each point on the mirror array may be to optically compensated for the difference in propagation time for each short pulse. By the expedient of sending the earlier pulses through longer paths and later pulses through shorter paths, a mirror array can reflect to a spot of extreme small dimension with simultaneity of all pulses and time of arrival. By sequentially timing the pulses through each amplifier, large amounts of energy can be delivered to a spot of small dimension with a much shorter pulse length than that of the laser amplifier. In addition, phasing locking the discrete amplifier outputs together, large apparent apertures can be generated for either small target size or long path lengths. Phase locking can occur within given colors or all colors. By utilizing an array of final amplifiers, each amplifier having an array of separately addressed mirrors, the disclosed system in effect stores light energy in transit and permits an arbitrary energy level to the impinge on such a small target.
REFERENCES:
patent: 3443243 (1969-05-01), Patel
patent: 3459466 (1969-08-01), Giorgmaine
patent: 3922618 (1975-11-01), Javan
patent: 3986130 (1976-10-01), Soures et al.
patent: 4019151 (1977-04-01), Brueckner et al.
patent: 4060769 (1977-11-01), Mallozzi et al.
patent: 4073572 (1978-02-01), Avicola
patent: 4093924 (1978-06-01), Farcy
patent: 4143332 (1979-03-01), Michon et al.
patent: 4200846 (1980-04-01), Stark et al.
Ewing et al., "Optical Pulse Compressor Systems for Laser Fusion," 5/79, pp. 368-379, IEEE Jour. of Quant. Electronics, vol. QE-15, #5 .
Stark, "Laser and Power Systems . . . Reactors," 5/9/78, 24 pages, Technology of Controlled Thermonuclear Fusion Meeting, LA-UR 781350.
Stark et al., "High Efficiency Laser Amplifier," 9/29/77, 13 pages, U.S. Pat. Appl. No. 838,011, NTIS, Abstracts also attached.
Ewing, "Pulse Compressor Sealing Issues . . . ," 9/19/78, PEW-15 EW-21, D.O.E. Schafer Assoc. Symp.
LandOfFree
Compressed pulse laser does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compressed pulse laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressed pulse laser will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-866440