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  2. Helium–neon laser - Wikipedia

    en.wikipedia.org/wiki/Heliumneon_laser

    The gain medium of the laser, as suggested by its name, is a mixture of helium and neon gases, in approximately a 10:1 ratio, contained at low pressure in a glass envelope. The gas mixture is mostly helium, so that helium atoms can be excited. The excited helium atoms collide with neon atoms, exciting some of them to the state that radiates 632 ...

  3. List of laser types - Wikipedia

    en.wikipedia.org/wiki/List_of_laser_types

    F-center laser 2.3-3.3 μm Ion laser Spectroscopy Optically pumped semiconductor laser 920 nm-1.35 μm Laser diode Projection, life sciences, forensic analysis, spectroscopy, eye surgery, laser light shows. The lasing medium is a semiconductor chip. Frequency doubling or tripling is typically done to produce visible or ultraviolet radiation.

  4. Gas laser - Wikipedia

    en.wikipedia.org/wiki/Gas_laser

    The gas laser was the first continuous-light laser and the first laser to operate on the principle of converting electrical energy to a laser light output. The first gas laser, the Heliumneon laser (HeNe), was co-invented by Iranian engineer and scientist Ali Javan and American physicist William R. Bennett, Jr., in 1960. It produced a ...

  5. Laser absorption spectrometry - Wikipedia

    en.wikipedia.org/wiki/Laser_absorption_spectrometry

    Laser absorption spectrometry (LAS) refers to techniques that use lasers to assess the concentration or amount of a species in gas phase by absorption spectrometry (AS). Optical spectroscopic techniques in general, and laser-based techniques in particular, have a great potential for detection and monitoring of constituents in gas phase .

  6. Laser - Wikipedia

    en.wikipedia.org/wiki/Laser

    A heliumneon laser demonstration. The glow running through the center of the tube is an electric discharge. This glowing plasma is the gain medium for the laser. The laser produces a tiny, intense spot on the screen to the right. The center of the spot appears white because the image is overexposed there. Spectrum of a heliumneon laser.

  7. Output coupler - Wikipedia

    en.wikipedia.org/wiki/Output_coupler

    Output coupler of a 594 nm HeliumNeon laser. In its most common form, an output coupler consists of a partially reflective mirror, sometimes called a beamsplitter. The reflectance and transmittance of the mirror is usually determined by the gain of the laser medium. In some lasers the gain is very low, so the beam must make hundreds of ...

  8. Resonance ionization - Wikipedia

    en.wikipedia.org/wiki/Resonance_ionization

    A model resonance ionization mass spectrometry (RIMS) set-up consists of a laser system (consisting of multiple lasers), sample from which the atoms are derived, and a suitable mass spectrometer which mass-selectively detects the photo ions created from resonance. In resonant ionization, atoms or molecules from ground state are excited to ...

  9. File:Helium neon laser spectrum.svg - Wikipedia

    en.wikipedia.org/wiki/File:Helium_neon_laser...

    English: Spectrum of a en:Helium neon laser taken using an Ocean Optics HR2000 spectrometer by bouncing the laser off of a white benchtop and guiding the diffuse reflected light directly into the spectrometer. The emission spectrum of the HeNe laser is even more monochromatic than seen here (it is typically around a mere 2 picometers in ...

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