Photonics devices
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Photonics devices use photons to transmit, control, manipulate and store data. They offer benefits like greater energy savings and communication distances due to their unique characteristics, such as being less sensitive to interference. Light-emitting diodes (LEDs) are semiconductor light sources used as indicator lamps and increasingly for lighting. They have advantages over other light sources like lower energy use, longer lifetimes, and smaller size. Photodiodes are PN junction diodes designed to detect photons and convert light into an electrical current. Laser diodes are semiconductor devices that produce coherent light when current passes through and are used to convert electrical signals into light signals.
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Photonics devices
- 2. Photonics is the transmission, control, manipulation and storage of data using photons (the basic building blocks of light). The unique characteristics of photonic devices create an additional dimension energy saving and larger communication distances. In addition, photonic devices are less sensitive to interference and have unique physical characteristics.
- 4. A Light-emitting Diodes is a semiconductor light source. LEDs are used as indicator lamps. In many devices, and are increasingly used for lighting. . LED is often small in area (less than 1 mm2 ) . It presents many advantages over bright light sources including lower energy consumption, longer life time, Smaller size and fast switching .
- 5. LEDS are poor diodes usually made from gallium arsenide. With the proper voltage and current it will emit photons at some variable frequency in small visual spectrum whereby it can visually be seen with our eyes in difference colors in the visual spectrum.
- 6. PHOTO DIODES
- 7. Photodiodes are PN junction diodes designed specifically to prove the photoelectric effect. This means the device show the junction region of the PN diode to incoming photons which results in conducting the transfer of electrons across the junction. 1-The active area, i.e., the light-sensitive area . 2-The maximum allowed photocurrent (usually limited by saturation). 3-The dark current (The current through the photodiode in the absence of light, when it is operated in photoconductive mode). 4-The photocurrent divided by optical power –related to the quantum efficiency, dependent on the wavelength .
- 8. A photodiode is a p-n junction ,When a photon of sufficient energy strikes the diode, it excites an electron, thereby creating a free electrons (and a positively charged electron hole). This mechanism is also known as the inner photoelectric effect .
- 9. Laser Diode
- 10. A laser diode is a component that converts an electrical signal into a corresponding light signal. A laser diode a semi conductor device that produces coherent radiation in the visible or infrared (IR) spectrum when current passes through it. 1- Small size and weight: A typical laser diode measures less than one millimeter across and weighs a fraction of a gram. 2- Low current, voltage, and power requirements 3- Low intensity: A laser diode cannot be used spectacular purposes. such as burning holes in metal, bringing down satellites.
- 11. Laser diode is completely solid state and do not require fragile glass elements. It is formed by doping a very thin layer on the surface of a crystal wafer. The crystal is doped to produce an n-type region and a p- type region, one above the other, resulting in a p-n junction, or diode. A power supply for energizing the laser diode pump source.
- 12. Molhum Mohammed Hamed 115002 Mohammed Essam Mohammed 115057 Mohammed Abdo Mohammed 115059 Amr Aidross Abdullah 115081 Ziad Ahmed 115084