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Laser Physics

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Laser Physics

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Lasers are devices that produce light with properties very different than those of other light sources, e.g., incandescent bulbs or LEDs. These unique characteristics enable a remarkably wide range of applications. Laser light can travel large distances as a narrow beam without diverging, allowing it to be used in laser pointers, laser light shows, and even for communication between satellites. The light can also be focused to a very tight spot, enabling sub-cellular microscopic imaging, reading/writing large amounts of data to/from DVDs and Blu-ray discs, and photolithography, which is critical in the production of modern microelectronics. Furthermore, if this tightly-focused light is confined to very short bursts or pulses, high-intensity lasers can be used for a variety of micromachining applications, including cutting/marking materials such a ceramics, glass, and metals as well as safe ablation of human tissue. Finally, laser light can have a very narrow spectrum or singular color that enables high-resolution spectroscopy and optical fiber communication.

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