Optoelectronics and Quantum Physics

Laser and Its Types

A laser is a device that emits light as a laser beam. A laser beam differs from a light beam in that its rays are collimated, coherent (of the same frequency and waveform), and monochromatic (of a single colour) (going in the same direction). Lasers deliver this "precise information," which makes them the best choice for applications requiring high precision. The term "Laser" stands for Light Amplification by Stimulated Emission of Radiation. A laser produces energy in the form of light that is in or very near the optical region of the electromagnetic spectrum. Through an atomic process known as stimulated emission, the laser energy is amplified to an exceedingly high intensity.