Ragnarok
6th June 2010, 07:16 AM
Some lasers use metal in its vapor state as the medium to generate coherent light across the spectrum. Some of these lasers use precious metals.
Snips from Wiki:
"Metal ion lasers are gas lasers that generate deep ultraviolet wavelengths. Helium-silver (HeAg) 224 nm and neon-copper (NeCu) 248 nm are two examples. These lasers have particularly narrow oscillation linewidths of less than 3 GHz (0.5 picometers),[3] making them candidates for use in fluorescence suppressed Raman spectroscopy."
"Helium-cadmium (HeCd) metal-vapor laser 441.563 nm (deep blue), 325 nm (UV). Electrical discharge in metal vapor mixed with helium buffer gas. Printing and typesetting applications, fluorescence excitation examination (ie. in U.S. paper currency printing), scientific research.
Helium-mercury (HeHg) metal-vapor laser 567 nm (yellow-green), 615 nm (orange). Rare, scientific research, amateur laser construction.
Helium-selenium (HeSe) metal-vapor laser up to 24 wavelengths between red and UV. Rare, scientific research, amateur laser construction.
Helium-silver (HeAg) metal-vapor laser[2] 224.3 (UV) nm. Scientific research
Strontium Vapor Laser 430.5 nm (blue-violet) Scientific research
Neon-copper (NeCu) metal-vapor laser[2] 248.6 nm (UV) Electrical discharge in metal vapor mixed with neon buffer gas. Scientific research
Copper vapor laser 510.6 nm (green), 578.2 nm (yellow) Electrical discharge Dermatological uses, high speed photography, pump for dye lasers.
Gold vapor laser 627 nm (red) Rare, dermatological and photodynamic therapy uses."
Below is shown a helium-cadmium laser:
R.
Snips from Wiki:
"Metal ion lasers are gas lasers that generate deep ultraviolet wavelengths. Helium-silver (HeAg) 224 nm and neon-copper (NeCu) 248 nm are two examples. These lasers have particularly narrow oscillation linewidths of less than 3 GHz (0.5 picometers),[3] making them candidates for use in fluorescence suppressed Raman spectroscopy."
"Helium-cadmium (HeCd) metal-vapor laser 441.563 nm (deep blue), 325 nm (UV). Electrical discharge in metal vapor mixed with helium buffer gas. Printing and typesetting applications, fluorescence excitation examination (ie. in U.S. paper currency printing), scientific research.
Helium-mercury (HeHg) metal-vapor laser 567 nm (yellow-green), 615 nm (orange). Rare, scientific research, amateur laser construction.
Helium-selenium (HeSe) metal-vapor laser up to 24 wavelengths between red and UV. Rare, scientific research, amateur laser construction.
Helium-silver (HeAg) metal-vapor laser[2] 224.3 (UV) nm. Scientific research
Strontium Vapor Laser 430.5 nm (blue-violet) Scientific research
Neon-copper (NeCu) metal-vapor laser[2] 248.6 nm (UV) Electrical discharge in metal vapor mixed with neon buffer gas. Scientific research
Copper vapor laser 510.6 nm (green), 578.2 nm (yellow) Electrical discharge Dermatological uses, high speed photography, pump for dye lasers.
Gold vapor laser 627 nm (red) Rare, dermatological and photodynamic therapy uses."
Below is shown a helium-cadmium laser:
R.