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Photonics Dictionary

semiconductor laser

A semiconductor material which is designed and grown for the efficient production of short wavelength stimulated emission through high gain as well as low internal losses. Materials with band gap energies which emit radiation efficiently within the desired wavelength region are used. Diodes may emit vertically in relation to the laser material junction in a VCSEL configuration or horizontally in an edge emitting configuration.

Synonymous with laser diode.  Sometimes used interchangeably with diode laser, which more properly refers to a laser system composed of a gain element and external elements such as lenses and a grating to select a single wavelength.   
 
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