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Employs a solid gain medium, such as a crystal containing rare-earth ions. Frequently used in laser cutting and material processing.

Generates coherent, high-frequency electromagnetic radiation via a relativistic electron beam, particularly valuable in research.

Utilizes doped fiber as the gain medium. It's efficient for high precision tasks like welding, cutting, and marking.

Uses an electric current to excite a gas medium, producing coherent light. Commonly used in laser light shows and barcode scanners.

Electrons traverse through a series of quantum wells to produce photons at mid-infrared to terahertz frequencies, used in gas sensing and spectroscopy.

Uses reactive gases combined with inert gases to generate a laser beam. Most often used in photolithography and eye surgeries.

Relies on semiconductor diodes as the gain medium. These are compact and commonly found in consumer electronics.

Powered by a chemical reaction, these lasers can produce high-power beams, mainly utilized in military applications.

Employs an organic dye as the lasing medium, usually pumped by another laser, and allows for a wide range of output colors.