High-power, highly stable KrF laser with a 4-kHz pulse repetition rate

Journal Article · Mon Aug 31 04:00:00 EDT 2015 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2015V045N08ABEH015658· OSTI ID:22551200

Borisov, V M; El'tsov, A V; Khristoforov, O B ^[1]

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1. State Research Center of Russian Federation 'Troitsk Institute for Innovation and Fusion Research', Troitsk, Moscow Region (Russian Federation)

An electric-discharge KrF laser (248 nm) with an average output power of 300 W is developed and studied. A number of new design features are related to the use of a laser chamber based on an Al{sub 2}O{sub 3} ceramic tube. A high power and pulse repetition rate are achieved by using a volume discharge with lateral preionisation by the UV radiation of a creeping discharge in the form of a homogeneous plasma sheet on the surface of a plane sapphire plate. Various generators for pumping the laser are studied. The maximum laser efficiency is 3.1%, the maximum laser energy is 160 mJ pulse{sup -1}, and the pulse duration at half maximum is 7.5 ns. In the case of long-term operation at a pulse repetition rate of 4 kHz and an output power of 300 W, high stability of laser output energy (σ ≤ 0.7%) is achieved using an all-solid-state pump system. (lasers)

• OSTI ID: 22551200
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 8 Vol. 45; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CREEP
EFFICIENCY
ELECTRIC DISCHARGES
HOMOGENEOUS PLASMA
KHZ RANGE
KRYPTON FLUORIDE LASERS
OPTICAL PUMPING
PLASMA SHEET
PULSED IRRADIATION
SAPPHIRE
SURFACES
ULTRAVIOLET RADIATION