Laser & Photo-Medicine Definitions

Laser Diode

A semiconducting device which emits monochromatic non-ionizing radiation by a process of stimulated emission. A laser beam has a number of unique properties, such as coherence, polarization and directionality. Beams emitted by laser diodes are not, as is often stated, ‘straight’ and/or ‘parallel’. Unless manipulated with additional optical devices such as lenses, a laser diode’s beam is broadly divergent along one plane and narrowly divergent along the perpendicular plane, producing an elliptical cross-section.

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