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How to Make a Laser Beam Without a Laser Resonator

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Amplified spontaneous emission produces a well-collimated output beam.

Breck Hitz

Superradiant lasers — ones that produce enough gain in a single pass to generate significant output — have been around since the early days of nitrogen lasers in the 1960s. Recently, scientists at Imperial College London refined the concept to produce a resonatorless Nd:YVO4 laser that generates 30 W at 1.06 μm in a very highly collimated — M2 ~1.3 — beam. The advantage of a resonatorless laser is that it has a high tolerance to component misalignment and other perturbations. In a conventional laser, mirrors form a resonator in which light at certain specific frequencies oscillates....Read full article

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    Published: September 2007
    Nd:YVO4 lasernitrogen lasersResearch & TechnologySuperradiant lasersLasers

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