Laser diodes with different wavelength: 405nm, 450nm, 520nm, 635nm, 638nm, 780nm, 808nm, 980nm, 1064nm. And the wavelengths make the laser diodes to different colors : violet laser diodes, red laser diodes, pink laser diodes, green laser diodes, infrared laser diodes.
Output power from 1mW to 2000mW. You can find all laser diodes by wavelengths here.
The brands for laser diodes are Nichia, Sanyo, Sony, Panasonic,
Most of the laser diodes you can easily find them online, however for some new laser diodes, such as 1550nm c-mount laser diode, Nichia NDV4B16 405nm LD, these LDs are new developed, they’re not easy to find.
The laser diode has a datasheet like this:
Most of the laser diodes are package as following: