laser diode - translation to Αγγλικά
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laser diode - translation to Αγγλικά

SEMICONDUCTOR LASER
Injection laser diode; Diode laser; Semiconductor laser; Laser diodes; Semiconductor lasers; Injection laser; Laser diode bar; Semiconductor diode laser; Injection laser diodes; Diode lasers; Semiconductor laser diode; Laser Diode; High power solid-state laser source; High power Solid-state laser source
  • SEM ([[scanning electron microscope]]) image of a commercial laser diode with its case and window cut away. The anode connection on the right has been accidentally broken by the case cut process.
  • 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.
  • Semi-conductor lasers (Bottom to Top: 660 nm, 635 nm, 532 nm, 520 nm, 445 nm, 405 nm)
  • A simple and low power metal enclosed laser diode
  • Nick Holonyak
  • Diagram of front view of a double heterostructure laser diode; not to scale
  • Diagram of front view of a simple quantum well laser diode; not to scale
  • Diagram of front view of a separate confinement heterostructure quantum well laser diode; not to scale
  • Diagram of a simple VCSEL structure; not to scale

laser diode         
diodo laser, minuscolo semiconduttore che emana radioazione quando è attraversato da una corrente elettrica
blue laser         
  • Trails of a 20 mW 405 nm violet laser shows clear [[fluorescence]]{{brk}}on some objects
  • 445nm - 450nm Blue Laser (middle)
LASER THAT EMITS ELECTROMAGNETIC RADIATION
Blue laser disc; Blue laser diode; Blue Laser; Blue diode laser; Blacklaser; Violet laser
laser blu, raggio laser avente una lunghezza d"onda minore di quella del laser rosso (utilizzato nei compact disc e nelle stampanti, possiede altissime capacità di lettura e immagazzinazione)
laser printer         
  • Magnification of color laser printer output, showing individual toner particles comprising 4 dots of an image with a bluish background
  • Applying a negative charge to the photosensitive drum
  • [[Fuji Xerox]] color laser printer C1110B
  • [[Gary Starkweather]] (seen here in 2009) invented the laser printer.
  • Laser light selectively neutralizes the negative charge on the photoreceptive drum, to form an electrostatic image
  • Toner is fused onto paper with heat and pressure
  • Diagram of a laser printer
  • A video on research done on printer emissions
  • Small yellow dots on white paper, generated by a color laser printer, are nearly invisible. (Click to see higher-resolution image)
ELECTROSTATIC DIGITAL PRINTING PROCESS
Laser jet; Laser printers; Laserprinter; Laser-class printer; Lazer printer; Color laser printer; Laser Printer; Laser print; Colour laser printer; Waste toner; Laser printer; Laser phototypesetting; NEC Silentwriter; Silentwriter; Transfer belt; Photo conductor unit; History of laser printing
stampante laser (tipo di stampante che opera grazie al raggio laser)

Ορισμός

tunnel diode
¦ noun Electronics a two-terminal semiconductor diode using tunnelling electrons to perform high-speed switching operations.

Βικιπαίδεια

Laser diode

A laser diode (LD, also injection laser diode or ILD, or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction.: 3 

Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission. Stimulated emission can be produced when the process is continued and further generates light with the same phase, coherence and wavelength.

The choice of the semiconductor material determines the wavelength of the emitted beam, which in today's laser diodes range from infrared to the ultraviolet (UV) spectrum. Laser diodes are the most common type of lasers produced, with a wide range of uses that include fiber optic communications, barcode readers, laser pointers, CD/DVD/Blu-ray disc reading/recording, laser printing, laser scanning and light beam illumination. With the use of a phosphor like that found on white LEDs, laser diodes can be used for general illumination.