Erhard J Schimitschek

41384016, Feb 6, 1979

Mar 29, 1976

5/671236

Peter R. Hammond - Livermore CA
Erhard J. Schimitschek - San Diego CA
John A. Trias - La Mesa CA

The United States of America as represented by the Secretary of the Navy - Washington DC

C07D49104

546 89

2-Keto-6,7,8,9-tetrahydro-2H-pyrano(3,2-g)-quinoline and 2-keto-9-methyl-,8,9-tetrahydro-2H-pyrano(3,2-g)-quinoline, compounds useful as laser dyes, are prepared from 7-hydroxy-1,2,3,4-tetrahydroquinoline.

40268985, May 31, 1977

Mar 4, 1976

5/663887

Ronald A. Henry - China Lake CA
Peter R. Hammond - Livermore CA
Erhard J. Schimitschek - San Diego CA
John A. Trias - La Mesa CA

The United States of America as represented by the Secretary of the Navy - Washington DC

C07D47104

260288CF

7-Oxo-1,2,3,3,8-pentamethyl-5-trifluoromethyl-2,3,7,8-tetrahydro-1-H-pyrrol 3,2-g] quinoline, a new compound, useful as a blue-green laser dye, is prepared from a substituted indole. It has the expanded formula ##STR1##.

42297117, Oct 21, 1980

Aug 23, 1978

5/936289

Erhard J. Schimitschek - San Diego CA
John E. Celto - San Diego CA
John A. Trias - La Mesa CA

The United States of America as represented by the Secretary of the Navy - Washington DC

H01S 3091
H01S 314

331 945P

A pulsed laser produces emitted laser energy by photodissociation of metal dihalide and cyclic recombination. A metal dihalide selected from sub-group II-B of the periodic table of elements is contained within an elongated sealed enclosure. Ultraviolet photons supplied from another laser employed as an excitation pump causes dissociation of the metal dihalide for achieving the ultimate laser action. An inert buffer gas is included within the enclosure for aiding photon energy transfer uniformity and to provide vibrational relaxation of the lasing medium in its electronic states. Two reflective surfaces, one of which is only partially reflective, are aligned with the principal axis of the laser assembly for producing an optical resonator for the emitted laser energy.

42622670, Apr 14, 1981

Aug 27, 1979

6/069697

Erhard J. Schimitschek - San Diego CA
John E. Celto - San Diego CA

The United States of America as represented by the Secretary of the Navy - Washington DC

H01S 322

331 945G

A pulsed laser emits laser energy by dissociative excitation of metal dihalide and cyclic recombination. A metal dihalide selected from subgroup II-B of the periodic table of elements is contained within an elongate sealed enclosure. Two elongate electrodes having external terminals are supported in parallel relationship within the enclosure, forming a gap parallel to the principal axis of the enclosure. A source of pulsed electric power is connected to the terminals of the two electrodes, producing repetitive transverse electric discharges across the gap. An inert buffer gas is included within the enclosure for aiding electric discharge uniformity, to provide vibrational relaxation of the lasing medium in its electronic states and to participate in the dissociative excitation process. The buffer gas is one of several mixtures of discrete percentages of neon and nitrogen. The gas/vapor mixture, consisting of the chosen buffer gases and the chosen metal dihalide vapor is ionized by a third electrode within the enclosure connected to a source of pulses which immediately precede the pulses applied to the first and second electrode so that the lasing medium is preionized immediately prior to the principal electric discharge.

41684753, Sep 18, 1979

Feb 2, 1978

5/874434

Erhard J. Schimitschek - San Diego CA
John E. Celto - San Diego CA

The United States of America as represented by the Secretary of the Navy - Washington DC

H01S 322
H01S 3097

331 945G

A pulsed laser produces emitted laser energy by electron impact dissociation of metal dihalide and cyclic recombination. A metal dihalide selected from sub group II-B of the periodic table of elements is contained within an elongate sealed enclosure. Two elongate electrodes having external terminals are supported in parallel relationship within the enclosure, forming a gap parallel to the principal axis of the enclosure. A source of pulsed electric power is connected to the terminals of the two electrodes, producing repetitive transverse electric discharges across the gap. An inert buffer gas is included within the enclosure for aiding electric discharge uniformity, and to provide vibrational relaxation of the lasing medium in its electronic states. The buffer gas is ionized by a third electrode within the enclosure connected to a source of pulses which immediately precede the pulses applied to the first and second electrode so that the lasing medium is preionized immediately prior to the principal electric discharge. Two reflective surfaces, one of which is only partially reflective, are aligned with the principal axis of the laser assembly for producing an optical resonator for the emitted laser energy.

40510620, Sep 27, 1977

Sep 3, 1976

5/720175

Peter R. Hammond - Livermore CA
Erhard J. Schimitschek - San Diego CA
John A. Trias - La Mesa CA

The United States of America as represented by the Secretary of the Navy - Washington DC

H01S 320
F21K 200

25230117

7-Amino coumarin dyes with hydrocarbon substituents on the amino group, but otherwise unsubstituted are stable, efficient dyes which lase in the blue-green region in a flashlamp-pumped dye laser.

42284082, Oct 14, 1980

Oct 23, 1978

5/953381

Erhard J. Schimitschek - San Diego CA
John E. Celto - San Diego CA

The United States of America as represented by the Secretary of the Navy - Washington DC

H01S 322
H01S 3097

331 945G

A pulsed laser produces emitted laser energy by dissociative excitation of etal dihalide and cyclic recombination. A metal dihalide selected from subgroup II-B of the periodic table of elements is contained within an elongate sealed enclosure. Two elongate electrodes having external terminals are supported in parallel relationship within the enclosure, forming a gap parallel to the principal axis of the enclosure. A source of pulsed electric power is connected to the terminals of the two electrodes, producing repetitive transverse electric discharges across the gap. An inert buffer gas is included within the enclosure for aiding electric discharge uniformity, and to provide vibrational relaxation of the lasing medium in its electronic states. The buffer gas is ionized by a third electrode within the enclosure connected to a source of pulses which immediately precede the pulses applied to the first and second electrode so that the lasing medium is preionized immediately prior to the principal electric discharge. Two reflective surfaces, one of which is only partially reflective, are aligned with the principal axis of the laser assembly for producing an optical resonator for the emitted laser energy.