increasing wavelength?

Is it plausible to increase the wavelength of, say, infrared light? I have a 808 nm 1 watt laser and i am struggling with researching if it is plausible to do so, and if it is then how it would be accomplished?

Re-design6 years ago
How much? If you increase it very much it wouldn't be IR anymore, would it?
Increase ? There are non-linear crystals that will DOUBLE your optical frequency, I'm not familiar with ones that work the other way.