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2. Active laser medium - Wikipedia

   en.wikipedia.org/wiki/Active_laser_medium

   The active laser medium (also called a gain medium or lasing medium) is the source of optical gain within a laser. The gain results from the stimulated emission of photons through electronic or molecular transitions to a lower energy state from a higher energy state previously populated by a pump source. Examples of active laser media include:

3. Laser hair removal - Wikipedia

   en.wikipedia.org/wiki/Laser_hair_removal

   One of the first published articles describing laser hair removal was authored by the group at Massachusetts General Hospital in 1998. [2] [3] Laser hair removal is widely practiced in clinics, and even in homes using devices designed and priced for consumer self-treatment. Many reviews of laser hair removal methods, safety, and efficacy have ...

4. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

5. List of laser types - Wikipedia

   en.wikipedia.org/wiki/List_of_laser_types

   Holography, tattoo removal. The first laser, invented by Theodore Maiman in May 1960. Nd:YAG laser: 1.064 μm, (1.32 μm) Flashlamp, laser diode: Material processing, rangefinding, laser target designation, surgery, tattoo removal, hair removal, research, pumping other lasers (combined with frequency doubling to produce a green 532 nm beam ...

6. Ruby laser - Wikipedia

   en.wikipedia.org/wiki/Ruby_laser

   The ruby laser is a three level solid state laser. The active laser medium (laser gain/amplification medium) is a synthetic ruby rod that is energized through optical pumping, typically by a xenon flashtube. Ruby has very broad and powerful absorption bands in the visual spectrum, at 400 and 550 nm, and a very long fluorescence lifetime of 3 ...

7. Intense pulsed light - Wikipedia

   en.wikipedia.org/wiki/Intense_pulsed_light

   Intense pulsed light (IPL) is a technology used by cosmetic and medical practitioners to perform various skin treatments for aesthetic and therapeutic purposes, including hair removal, photorejuvenation (e.g. the treatment of skin pigmentation, sun damage, and thread veins) as well as to alleviate dermatologic diseases such as acne.