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  2. Blue laser - Wikipedia

    en.wikipedia.org/wiki/Blue_laser

    The violet 405 nm laser (whether constructed directly from GaN or frequency-doubled GaAs laser diodes) is not in fact blue, but appears to the eye as violet, a color for which a human eye has a very limited sensitivity.

  3. Laser diode - Wikipedia

    en.wikipedia.org/wiki/Laser_diode

    The laser diode chip removed and placed on the eye of a needle for scale A laser diode with the case cut away. The laser diode chip is the small black chip at the front; a photodiode at the back is used to control output power. SEM (scanning electron microscope) image of a commercial laser diode with its case and window cut away. The anode ...

  4. Laser pointer - Wikipedia

    en.wikipedia.org/wiki/Laser_pointer

    Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.

  5. Gallium nitride - Wikipedia

    en.wikipedia.org/wiki/Gallium_nitride

    For example, GaN is the substrate that makes violet (405 nm) laser diodes possible, without requiring nonlinear optical frequency doubling. Its sensitivity to ionizing radiation is low (like other group III nitrides), making it a suitable material for solar cell arrays for satellites.

  6. List of laser types - Wikipedia

    en.wikipedia.org/wiki/List_of_laser_types

    Flashlamp, laser diode: Periodontal scaling, dental laser, skin resurfacing Neodymium YLF solid-state laser 1.047 and 1.053 μm Flashlamp, laser diode Mostly used for pulsed pumping of certain types of pulsed Ti:sapphire lasers, combined with frequency doubling. Neodymium-doped yttrium orthovanadate (Nd:YVO 4) laser 1.064 μm laser diode

  7. Laser - Wikipedia

    en.wikipedia.org/wiki/Laser

    However, due to the cost and potential dangers, this is an uncommon hobby. Some hobbyists salvage laser diodes from broken DVD players (red), Blu-ray players (violet), or even higher power laser diodes from CD or DVD burners. [129] Hobbyists have also used surplus lasers taken from retired military applications and modified them for holography ...

  8. Excimer laser - Wikipedia

    en.wikipedia.org/wiki/Excimer_laser

    The Electra KrF laser demonstrates 90,000 shots over 10 hours. The term excimer is short for 'excited dimer', while 'exciplex' is short for 'excited complex'. Most excimer lasers are of the noble gas halide type, for which the term excimer is, strictly speaking, a misnomer. (Although less commonly used, the proper term for such is an exciplex ...

  9. Optical isolator - Wikipedia

    en.wikipedia.org/wiki/Optical_isolator

    Optical isolator for laser experiments. An optical isolator, or optical diode, is an optical component which allows the transmission of light in only one direction.It is typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity.

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