Abstract
Rainbow Stars—Multi-Color Laser Emission for Science and Art
Highlights
When I arrived, to my great surprise, I saw numerous laser spots twinkling very strongly on the screen
I thought this is a sort of nonlinear optical phenomenon, and that I might be able to enhance this colorful emission by increasing the output power of the dye laser
I immediately noticed that the dial indicating the voltage applied to the pump laser was already in the red zone, warning of possible, serious damage to the excimer laser
Summary
December 28, 1987: Shuichi Kawasaki, one of my graduate students, shouted for me to:. “That is not correct, I am not sure why These colorful spots only appear when the wavelength is adjusted 6–7 nm away from the maximum of the gain curve.”. This phenomenon can be observed only when the output power is at a maximum, indicating that it is generated by a type of nonlinear optical effect.”. He moved the laser wavelength to the maximum of the gain curve, and surprisingly all of the colorful spots disappeared. “Did you adjust the laser wavelength precisely at the center of the gain curve?” He motioned with his eyes to look at the meter, indicating the laser power. The spots, almost spaced in frequency, could be clearly seen and their colors changed continuously over the entire visible region
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