Which of the following is a characteristic of semiconductor lasers?

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Laser topics include: Laser basics and its applications, optical fibre, einstein coefficients, population inversion, pumping mechanism, ruby laser, helium neon laser, carbon dioxide and semiconductor laser. A laser is a device that emits light through a process of optical amplification. The word "laser" is an acronym for "light amplification by stimulated emission of radiation".  There are six types of lasers, based on the medium used in them: Solid-state lasers Gas lasers Liquid lasers Semiconductor lasers Chemical lasers Metal-vapour lasers  Here are some examples of... Show more

Which of the following is a characteristic of semiconductor lasers?