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Amplifier Boosts Efficiency of Microlaser

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Breck Hitz

Miniature, longitudinally pumped, Q-switched solid-state lasers have relatively low efficiency, in part because much of the diode pump light passes through the laser chip without being absorbed. Recently, scientists at Massachusetts Institute of Technology's Lincoln Laboratory in Lexington have shown that adding an amplifier to scavenge the otherwise-wasted pump power can increase laser efficiency by more than a factor of two without appreciable increase in the laser's cost or complexity. Figure 1. Laser efficiency can be increased by a factor of two by adding an amplifier to use pump...Read full article

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    Published: March 2004
    Glossary
    solid-state laser
    A solid-state laser is a type of laser that uses a solid gain medium (as opposed to a liquid or gas) to produce coherent light. The term "solid-state" refers to the fact that the active medium, where the lasing action occurs, is a solid material. This material is typically a crystalline or glass-like substance doped with specific ions or atoms that can undergo stimulated emission to generate laser light. The basic components of a solid-state laser include: Gain medium: This is the solid...
    diode lasersdiode pump lightenergylaser chipMassachusetts Institute of Technology Lincoln LaboratoryQ-switchedResearch & Technologysolid-state laserTech PulseLasers

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