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  2. 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 ...

  3. Semiconductor laser theory - Wikipedia

    en.wikipedia.org/wiki/Semiconductor_laser_theory

    Semiconductor lasers or laser diodes play an important part in our everyday lives by providing cheap and compact-size lasers. They consist of complex multi-layer structures requiring nanometer scale accuracy and an elaborate design. Their theoretical description is important not only from a fundamental point of view, but also in order to ...

  4. Laser construction - Wikipedia

    en.wikipedia.org/wiki/Laser_construction

    Schematic diagram of a typical laser, showing the three major parts. A laser is constructed from three principal parts: An energy source (usually referred to as the pump or pump source), A gain medium or laser medium, and; Two or more mirrors that form an optical resonator.

  5. 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. [127] Hobbyists have also used surplus lasers taken from retired military applications and modified them for holography ...

  6. 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.

  7. File:Simple laser diode.svg - Wikipedia

    en.wikipedia.org/wiki/File:Simple_laser_diode.svg

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...

  8. Vertical-cavity surface-emitting laser - Wikipedia

    en.wikipedia.org/wiki/Vertical-cavity_surface...

    Diagram of a simple VCSEL structure. The vertical-cavity surface-emitting laser (VCSEL / ˈ v ɪ k s əl /) is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge-emitting semiconductor lasers (also called in-plane lasers) which emit from surfaces formed by cleaving the individual chip out of a wafer.

  9. Quantum well laser - Wikipedia

    en.wikipedia.org/wiki/Quantum_well_laser

    A quantum-well laser is a laser diode in which the active region of the device is so narrow that quantum confinement occurs. Laser diodes are formed in compound semiconductor materials that (quite unlike silicon ) are able to emit light efficiently.