Visualization of plasma-induced processes by a projection system with a Cu-laser-based brightness amplifier

High-Speed Visualization of Nanopowder Combustion in Air

“…The limitation is that lasing power more than 5-10 mW can influence on the combustion process. The advantage of active optical systems with metal vapor brightness amplifiers is the possibility of observing the processes through the broadband background lighting [17][18][19][20]. According to [16,20], the plasma will remain transparent to the laser monitor as long as the energy exposure concentrated in the emission spectrum of the brightness amplifier does not exceed its self-noise i.e.…”

“…Gaseous metal vapor active media have unique characteristics such as high single pass gain, high pulse repetition frequency, operation in a visible spectral region, high average power and ability to control laser radiation parameters [10][11][12][13][14][15]. This makes these media appropriate for use as brightness amplifiers in laser projection microscopes and laser monitors [16][17][18][19][20]. Emitting at two wavelengths in green (510.6 nm) and yellow (578.2 nm) spectral regions copper vapor laser was used for the first time to observe the electrodes of carbon arc and was referred to as "laser monitor" [17].…”

From a metal vapor laser projection microscope to a laser monitor (by the 50 year-anniversary of metal vapor lasers)

“…6, the instrument makes it possible to monitor the welding process: formation of small molten pools, wave patterns on the weld seam, flows and fluctuations in the melt [20]. The same group obtained important results on the modification of the cathode surface, including cases with the intense background radiation of non-equilibrium low-temperature plasma of erosive capillary discharge [21]. Another study of great interest was carried out by P. Bokhan with his colleagues.…”

Laser monitor for remote object visualization

“…A combination of unique characteristics of these lasers, specifically high amplification rate and output power makes it possible to form a magnified image on a big screen in cases when the object is minimally illuminated and / or blocked from view by the intense background radiation. Image registration using high-speed cameras allows us to monitor different fast processes in realtime [2][3][4], including remote sensing [5]. For example, in papers [6,7] the possibility of monitoring self-propagating high-temperature synthesis and one of the options of using an active optical system for obtaining an image, which had been formed with the use of the LCD display, were shown.…”