Laser and Optical device

Laser noun - An acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light.

Optical device and laser are semantically related. In some cases you can use "Optical device" instead a noun "Laser".

Optical device noun - A device for producing or controlling light.

Laser and optical device are semantically related. Sometimes you can replace term "Laser" with "Optical device", this terms are similar.