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2. Laser pointer - Wikipedia

   en.wikipedia.org/wiki/Laser_pointer

   Colors and wavelengths. Early laser pointers were helium–neon (HeNe) gas lasers and generated laser radiation at 633 nanometers (nm), usually designed to produce a laser beam with an output power under 1 milliwatt (mW). The least expensive laser pointers use a deep-red laser diode near the 650 nm wavelength.

3. Laser diode - Wikipedia

   en.wikipedia.org/wiki/Laser_diode

   635 nm: AlGaInP better red-laser pointers, same power subjectively twice as bright as 650 nm; 650–660 nm: GaInP/AlGaInP CD and DVD drives, cheap red laser pointers; 670 nm: AlGaInP bar-code readers, first diode-laser pointers (now obsolete, replaced by brighter 650 nm and 671 nm DPSS) Infrared. 760 nm: AlGaInP gas sensing: O 2

4. List of laser types - Wikipedia

   en.wikipedia.org/wiki/List_of_laser_types

   Carbon dioxide laser: 10.6 μm, (9.4 μm) Transverse (high-power) or longitudinal (low-power) electrical discharge Material processing (laser cutting, laser beam welding, etc.), surgery, dental laser, military lasers. Carbon monoxide laser: 2.6 to 4 μm, 4.8 to 8.3 μm Electrical discharge

5. List of laser applications - Wikipedia

   en.wikipedia.org/wiki/List_of_laser_applications

   Laser pointers in different colours. Many scientific, military, medical and commercial laser applications have been developed since the invention of the laser in 1958. The coherency, high monochromaticity, and ability to reach extremely high powers are all properties which allow for these specialized applications.

6. Blue laser - Wikipedia

   en.wikipedia.org/wiki/Blue_laser

   Violet DPSS laser pointers (120 mW at 405 nm) use a direct diode infrared gallium arsenide (1 W @ 808 nm) lasers being directly doubled, without a longer-wave diode-pumped solid state laser interposed between diode laser and doubler-crystal results in higher-power. Blue DPSS laser pointers, initial availability around 2006, have the same basic ...

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8. Diode-pumped solid-state laser - Wikipedia

   en.wikipedia.org/wiki/Diode-pumped_solid-state_laser

   DPSSLs have advantages in compactness and efficiency over other types, and high power DPSSLs have replaced ion lasers and flashlamp-pumped lasers in many scientific applications, and are now appearing commonly in green and other color laser pointers.