Lasers, laser amplifiers and oscillators as follows: a. Copper vapor lasers having both of the following characteristics: 1. Operating at wavelengths between 500 and 600 nm; and 2. An average output power equal to or greater than 40 W; b. Argon ion lasers having both of the following characteristics: 1. Operating at wavelengths between 400 and 515 nm; and 2. An average output power greater than 40 W; c. Neodymium-doped (other than glass) lasers with an output wavelength between 1000 and 1100 nm having either of the following: 1. Pulse-excited and Q-switched with a pulse duration equal to or greater than 1 ns, and having either of the following: a. A single-transverse mode output with an average output power greater than 40 W; or b. A multiple-transverse mode output with an average output power greater than 50 W; or 2. Incorporating frequency doubling to give an output wavelength between 500 and 550 nm with an average output power of greater than 40 W; d. Tunable pulsed single-mode dye laser oscillators having all of the following characteristics: 1. Operating at wavelengths between 300 and 800 nm; 2. An average output power greater than 1 W; 3. A repetition rate greater than 1 kHz; and 4. Pulse width less than 100 ns; e. Tunable pulsed dye laser amplifiers and oscillators having all of the following characteristics: 1. Operating at wavelengths between 300 and 800 nm; 2. An average output power greater than 30 W; 3. A repetition rate greater than 1 kHz; and 4. Pulse width less than 100 ns; f. Alexandrite lasers having all of the following characteristics: 1. Operating at wavelengths between 720 and 800 nm; 2. A bandwidth of 0.005 nm or less; 3. A repetition rate greater than 125 Hz; and 4. An average output power greater than 30 W; g. Pulsed carbon dioxide lasers having all of the following characteristics: 1. Operating at wavelengths between 9000 and 11000 nm; 2. A repetition rate greater than 250 Hz; 3. An average output power greater than 500 W; and 4. Pulse width of less than 200 ns; h. Pulsed excimer lasers (XeF, XeCl, KrF) having all of the following characteristics: 1. Operating at wavelengths between 240 and 360 nm; 2. A repetition rate greater than 250 Hz; and 3. An average output power greater than 500 W; i. Para-hydrogen Raman shifters designed to operate at 16 μ m output wavelength and at a repetition rate greater than 250 Hz.