Coherent light generators – Particular active media – Gas
Patent
1996-09-30
1998-02-03
Lee, John D.
Coherent light generators
Particular active media
Gas
372 23, 372 32, 372 37, H01S 3097, H01S 3134
Patent
active
057152691
ABSTRACT:
An ion laser apparatus capable of simultaneous oscillation at a plurality of wavelengths is provided, which makes it possible to stabilize not only the overall output beam but also each component of the output beam. A laser tube having a pair of optical mirrors at each end is driven by a first electric current, thereby causing a specific electric discharge in the tube. A magnetic-field generator is driven by a second electric current, thereby generating a specific magnetic field in the tube to focus or collect a plasma generated in the tube. An optical beam splitter splits a reference beam generated from the output laser beam into first and second feedback beams. First and second detectors detect the feedback beams to thereby generate first and second electric signals, respectively. The electric discharge in the tube is controlled by the use of the first electric signal, and the magnetic field in the tube is controlled by the use of the second electric signal. The fact that the magnetic field has an optimum value which varies dependent upon the wavelength value of the second feedback beam is used for stabilizing each component of the output beam.
REFERENCES:
patent: 3622908 (1971-11-01), Skolnick
patent: 3931589 (1976-01-01), Aisenberg et al.
patent: 4748632 (1988-05-01), Preston
patent: 5280536 (1994-01-01), Dumond et al.
Lee John D.
NEC Corporation
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