Peculiarities of Efficient Plasma Generation in Air and Water by Short Duration Laser Pulses

We have conducted experiments to demonstrate an efficient generation of plasma discharges by focused nanosecond pulsed laser beams in air and provided recommendations on the design of optical systems to implement such plasma generation. We have also demonstrated generation of the secondary plasma di...

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Bibliographic Details
Published inNASA Center for AeroSpace Information (CASI). Reports
Main Authors Adamovsky, Grigory, Floyd, Bertram M
Format Report
LanguageEnglish
Published Hampton NASA/Langley Research Center 01.04.2017
Subjects
Laser beams
Laser plasmas
Lasers
Methylene blue
Plasma jets
Pulsed lasers
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Summary:We have conducted experiments to demonstrate an efficient generation of plasma discharges by focused nanosecond pulsed laser beams in air and provided recommendations on the design of optical systems to implement such plasma generation. We have also demonstrated generation of the secondary plasma discharge using the unused energy from the primary one. Focused nanosecond pulsed laser beams have also been utilized to generate plasma in water where we observed self-focusing and filamentation. Furthermore, we applied the laser generated plasma to the decomposition of methylene blue dye diluted in water.