Search results
Results from the WOW.Com Content Network
The laser works by the same principle as the maser, but produces higher-frequency coherent radiation at visible wavelengths. The maser was the precursor to the laser, inspiring theoretical work by Townes and Arthur Leonard Schawlow that led to the invention of the laser in 1960 by Theodore Maiman. When the coherent optical oscillator was first ...
[43] The annual Theodore Maiman Student Paper Competition was established in 2008, endowed by major laser groups, and is administered by the OSA Foundation. [44] In 2010 numerous events were staged worldwide by major scientific and industry photonics organizations to celebrate the 50th anniversary of Maiman's first laser and subsequent lasers ...
Chemical reaction in a burning jet of ethylene and nitrogen trifluoride (NF 3) Used in research for laser weaponry, operated in continuous-wave mode, can have power in the megawatt range. Deuterium fluoride laser ~3800 nm (3.6 to 4.2 μm) (~90% atm. transmittance) chemical reaction US military laser prototypes. COIL (chemical oxygen–iodine laser)
In 1951, Joseph Weber submitted a paper on using stimulated emissions to make a microwave amplifier to the June 1952 Institute of Radio Engineers Vacuum Tube Research Conference in Ottawa, Ontario, Canada. [41] After this presentation, RCA asked Weber to give a seminar on this idea, and Charles H. Townes asked him for a copy of the paper. [42]
The depth of penetration depends on the frequency of the microwaves and the tissue type. The Active Denial System ("pain ray") is a less-lethal directed energy weapon that employs a microwave beam at 95 GHz; a two-second burst of the 95 GHz focused beam heats the skin to a temperature of 130 °F (54 °C) at a depth of 1/64th of an inch (0.4 mm) and is claimed to cause skin pain without lasting ...
Ahead, the best lasers—including Fraxel, IPL, and RF microneedling—for reducing acne scars and post-inflammatory hyperpigmentation according to dermatologists.
A Gaussian beam photographic paper burn comparison of a carbon dioxide transversely-excited atmospheric-pressure laser obtained during the optimization process by adjusting the alignment mirrors. The optical resonator, or optical cavity, in its simplest form is two parallel mirrors placed around the gain medium, which provide feedback of the light.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!