Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1988-05-11
1991-04-16
LaRoche, Eugene R.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
2502082, 250216, 250552, 350354, 356222, 356225, 356233, 356234, 356256, G02F 101, G01J 142, G01J 140, H01J 4014
Patent
active
050077171
ABSTRACT:
A technique for the simultaneous measurement, in real time, of the changes in mode size, pulse length, and power of a wavetrain of laser pulses delivered by mode-locked or other pulsed laser systems contemplates directing respective portions of the beam along each of three beam paths. The beam portions along the first and second beam paths are subjected to respective, and different, degrees of focusing, and then passed through respective non-linear elements which generate radiation at the second harmonic. The first harmonic components are removed, and the second harmonic components are passed to respective first and second detectors which generate signals representative of the total second harmonic energy along each of the first and second beam paths. The beam portion along the third beam path is passed to a detector which generates a signal representative of the total energy in the beam pulse. The three signals are combined to give values proportional to peak power, pulse length, and mode size.
REFERENCES:
patent: 3641343 (1972-02-01), Langer
patent: 4037959 (1977-07-01), Bumgardner
patent: 4339199 (1982-07-01), Jones et al.
patent: 4681436 (1987-07-01), Ching et al.
Cutolo et al., "Real Time Processing of Picosecond and Femtosecond Laser Pulses: Application to Free-Electron Lasers", Applied Physics Letters, May 9, 1988, pp. 1566-1568.
Cutolo Antonello
Madey John M. J.
Solimeno Salvatore
LaRoche Eugene R.
Shingleton Michael B.
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