Picosecond CO(2) laser-pulse generation and amplification

The generation of 30-ps 10-mum laser pulses from an optical-free-induction-decay (OFID) 10-mum CO(2) laser system and the first realization of a UV-preionized high-pressure CO(2)-laser-pulse amplifier with Ernst-electrode profiles for these ultrashort CO(2) laser pulses are described. For a given tr...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1993-03, Vol.29 (3), p.997-1005
Main Authors: Kesselring, R, Kalin, A W, Schotzau, H J, Kneubuhl, F K
Format: Article
Language:English
Subjects:
426002 - Engineering- Lasers & Masers- (1990-)
AMPLIFICATION
CARBON DIOXIDE LASERS
ELECTRIC DISCHARGES
ELECTROMAGNETIC RADIATION
ENGINEERING
GAS LASERS
IONIZATION
LASER RADIATION
LASERS
PULSES
RADIATIONS
ULTRAVIOLET RADIATION
USES
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Summary:The generation of 30-ps 10-mum laser pulses from an optical-free-induction-decay (OFID) 10-mum CO(2) laser system and the first realization of a UV-preionized high-pressure CO(2)-laser-pulse amplifier with Ernst-electrode profiles for these ultrashort CO(2) laser pulses are described. For a given transverse electric discharge width, the Ernst profile makes it possible to position the UV-radiation sources nearer to the discharge than with the Rogowski or Chang profile. A more homogeneous preionization of the discharge area is possible. Thus, the amplifier works up to 15 bar with a laser-gas mixture of 5:5:90 (CO(2):N(2):He). The authors amplified 30-ps OFID 10-mum CO(2)-laser pulses up to ten times by passing through the amplifier twice. Thus, 10-mum OFID pulse energies of 1 mJ were achieved. With the amplifier used as an oscillator, a maximum output energy of 600 mJ was obtained in longitudinal-multimode operation for 50-ns pulses
ISSN:0018-9197
1558-1713
DOI:10.1109/3.206584