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Home > Art, Film & Photography > Gas Lasers: Nitrogen Laser, Carbon Dioxide Laser, Helium-Neon Laser, Tea Laser, Ion Laser, Gas Dynamic Laser, Gas Laser
Gas Lasers: Nitrogen Laser, Carbon Dioxide Laser, Helium-Neon Laser, Tea Laser, Ion Laser, Gas Dynamic Laser, Gas Laser

Gas Lasers: Nitrogen Laser, Carbon Dioxide Laser, Helium-Neon Laser, Tea Laser, Ion Laser, Gas Dynamic Laser, Gas Laser


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About the Book

Chapters: Nitrogen Laser, Carbon Dioxide Laser, Helium-neon Laser, Tea Laser, Ion Laser, Gas Dynamic Laser, Gas Laser. Source: Wikipedia. Pages: 40. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: A Nitrogen laser is a gas laser operating in the ultraviolet range (typically 337 nm), using molecular nitrogen as its gain medium, pumped by an electrical discharge. The wall-plug efficiency of the nitrogen laser is low, typically 0.1% or less, though nitrogen lasers with efficiency of up to 3% have been reported in the literature. The wall-plug efficiency is the product of the following three efficiencies: The gain medium is nitrogen molecules in the gas phase. The nitrogen laser is a 3-level laser. In contrast to a ruby laser or to other more typical 4-level lasers, the upper laser level of nitrogen is directly pumped, imposing no speed limits on the pump. Pumping is normally provided by direct electron impact; the electrons must have sufficient energy, or they will fail to excite the upper laser level. Typically reported optimum values are in the range of 80 to 100 eV per Torrcm pressure of nitrogen gas. There is a 40 ns upper limit of laser lifetime at low pressures and the lifetime becomes shorter as the pressure increases. The lifetime is only 1 to 2 ns at 1 atmosphere. In general ,The strongest lines are at 337.1 nm *wavelength in the ultraviolet. Other lines have been reported at 357.6 nm, also ultraviolet. This information refers to the second positive system of molecular nitrogen, which is by far the most common. No vibration of the two nitrogen atoms is involved, because the atom-atom distance does not change with the electronic transition. The rotation needs to change to deliver the angular momentum of the photon, furthermore multiple rotational states are populated at room tempera...More: http://booksllc.net/?id=2420153


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Product Details
  • ISBN-13: 9781156126325
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • No of Pages: 42
  • Spine Width: 3 mm
  • Weight: 73 gr
  • ISBN-10: 1156126320
  • Publisher Date: 15 Sep 2010
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Nitrogen Laser, Carbon Dioxide Laser, Helium-Neon Laser, Tea Laser, Ion Laser, Gas Dynamic Laser, Gas Laser
  • Width: 229 mm


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