All these 600nm-690nm Diode are red laser diodes: 635nm , 638nm, 650nm, 660nm, 670nm, 680nm laser diodes emit red laser beams.

These red laser diodes are used as light sources in a wide range of applications such as displays, bio-medical equipment, sensors, and printers because of their high output, high efficiency, excellent beam quality, and high reliability.

Red lasers are lights of a longer wavelength that can be produced using a simple diode; this option is cheaper and thus more popularly used in the market. Long story short, it’s simply cheaper to produce laser pointers that emit a red light over any other variations.

If you can’t find the right red laser diodes 600nm-690nm here at BeamQus. Try these optics suppliers as following.

635nm laser diode.

HL638 Laser Diode, 638nm, 2.4W .