Copper vapor laser

In 1971 A.A.Isaev, M.A.Kazaryan and G.G.Petrash have invented a self-heating concept which allowed to tremendously increase efficiency of the cooper (copper?)

Copper compound vapors also increase the complexity of the pump signal applied to the device.

Using singly ionized species of Cu, research has also demonstrated copper vapor lasers that are CW (continuous-wave), i.e., not pulsed, and lase at deep ultraviolet wavelengths.

[5][6] These lasers can provide average UV powers of several mW and are potentially useful for analytical instruments and spectroscopy.

[7] A copper vapor laser illuminated an artistic display performed by sculptor Dani Karavan in an arts meeting held in Tel Hai(Israel) in September 1980.

The alternating green and yellow moving beams were controlled by S. Kamin using a set of mirrors and chromatic filters.

[1] Copper vapour lasers were first used for entertainment purposes by Pink Floyd on their 1994 tour, supporting their album, The Division Bell.