Lasers are devices that produce intense beams of monochromatic, coherent radiation.

Laser protective eyewear includes glasses and goggles designed to filter out harmful radiation from lasers

Ion lasers function by stimulating the emission of radiation between two levels of an ionized gas.

Carbon dioxide (CO₂) lasers use the energy-state transitions between vibrational and rotational states of CO₂ molecules to emit at long IR, about 10 µm, wavelengths.

Laser beam analyzers are used to determine the quality of a laser beam

Laser mirrors are designed for high reflectance and durability at individual laser wavelength ranges

Interferometers measure distance in terms of wavelength and determine the wavelengths of light sources.