File Name: advantages and disadvantages of laser communication .zip
- The Advantages and Disadvantages of Fiber Optic Transmission
- Advantages and Disadvantages of Fiber Optic Transmission in Telecommunications
- Free Space Optical Communications — Theory and Practices
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for " light amplification by stimulated emission of radiation ". A laser differs from other sources of light in that it emits light which is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography.
The Advantages and Disadvantages of Fiber Optic Transmission
According to the report reported by Global Newswire, global fiber optics market was valued at around USD 2. These statistics show fiber optic transmission is experiencing its prime time and will change telecommunications greatly. Driven by the rising demand for higher bandwidth and faster speed connections for a variety of industrial and residential purposes, fiber optic transmission is becoming more and more common in modern society. In this tutorial, the advantages and disadvantages of fiber optic transmission will be explored in detail.
Usually, a fiber optic communication system consists of three main components: optical transmitter, fiber optic cable and an optical receiver.
The optical transmitter converts the electrical signal to the optical signal; the fiber optic cable carries the optical signal from the optical transmitter to the optical receiver, and the optical receiver reconverts the optical signal to electrical signal.
The most commonly used optical transmitter is semiconductor devices like LEDs light-emitting diodes and laser diodes. Photodetector is the key part of an optical receiver. It converts light into electricity using photodetector effect. As for the fiber optic cable, there is too much to say. As the use and demand for speed and bandwidth, the development of optical cables is amazing. Optical fibers are used as a medium for telecommunication and networking because it is flexible and can be bundled as cables.
It is especially advantageous for long-distance communications, because light propagates through the fiber with little attenuation compared to electrical copper cables. The figure below shows that all fiber optic transmission systems use modulated light to convey information from a transmitter to a companion receiver.
Figure 1: illustration of a basic fiber optic transmission system. Optical fibers have largely replaced copper wire communications in core networks in the developed world, because of its advantages over electrical transmission.
Here are the main advantages of fiber optic transmission. Extremely High Bandwidth : No other cable-based data transmission medium offers the bandwidth that fiber does. The volume of data that fiber optic cables transmit per unit time is far greater than copper cables.
Longer Distance : in fiber optic transmission, optical cables are capable of providing low power loss, which enables signals can be transmitted to a longer distance than copper cables. However, fiber has a very low rate of bit error 10 EXP , as a result of fiber being so resistant to electromagnetic interference.
Fiber optic transmission is virtually noise free. Low Security Risk : the growth of the fiber optic communication market is mainly driven by increasing awareness about data security concerns and use of the alternative raw material. Data or signals are transmitted via light in fiber optic transmission. Therefore there is no way to detect the data being transmitted by "listening in" to the electromagnetic energy "leaking" through the cable, which ensures the absolute security of information.
Small Size : fiber optic cable has a very small diameter. For instance, the cable diameter of a single OM3 multimode fiber is about 2mm, which is smaller than that of coaxial copper cable. Small size saves more space in fiber optic transmission. Light Weight : fiber optic cables are made of glass or plastic, and they are thinner than copper cables. These make them lighter and easy to install. Easy to Accommodate Increasing Bandwidth: with the use of fiber optic cable, new equipment can be added to existing cable infrastructure.
Because optical cable can provide vastly expanded capacity over the originally laid cable. Though fiber optic transmission brings lots of convenience, its disadvantages also cannot be ignored. Fragility : usually optical fiber cables are made of glass, which lends to they are more fragile than electrical wires.
In addition, glass can be affected by various chemicals including hydrogen gas a problem in underwater cables , making them need more cares when deployed underground. And if you bend them too much, they will break. And fiber cable is highly susceptible to becoming cut or damaged during installation or construction activities. All these make it difficult to install.
Because copper cable installation does not need extra care like fiber cables. However, optical fiber is still moving into the local loop, and through technologies such as FTTx fiber to the home, premises, etc. Figure 2: optical fiber and copper cable in FTTx. Special Equipment Is Often Required : to ensure the quality of fiber optic transmission, some special equipment is needed. For example, equipment such as OTDR optical time-domain reflectometry is required and expensive, specialized optical test equipment such as optical probes and power meter are needed at most fiber endpoints to properly provide testing of optical fiber.
Fiber optic transmission is widely used for data transmission and is increasingly being used in place of metal wires because of its efficiency and high transmission capacity. We have seen the fiber optic cables have replaced traditional copper twisted-pair cable or coaxial cable. As the use and demand for great bandwidth and fast speed, there is no doubt that fiber optic transmission will bring more opportunities and be continuously researched and expanded to cater for future demands.
Advantages and Disadvantages of Fiber Optic Transmission in Telecommunications
According to the report reported by Global Newswire, global fiber optics market was valued at around USD 2. These statistics show fiber optic transmission is experiencing its prime time and will change telecommunications greatly. Driven by the rising demand for higher bandwidth and faster speed connections for a variety of industrial and residential purposes, fiber optic transmission is becoming more and more common in modern society. In this tutorial, the advantages and disadvantages of fiber optic transmission will be explored in detail. Usually, a fiber optic communication system consists of three main components: optical transmitter, fiber optic cable and an optical receiver.
urad. However, the disadvantage to these narrow beams is that they need to Lasercom's advantages over radio frequency can be primarily attributed to its.
Free Space Optical Communications — Theory and Practices
Whether from the sun, fire, electric lights or light-emitting diodes LEDs , people have never known a world without infrared radiation IR. It toasts your bread, changes the channel on the TV and bakes the paint on a new car. On the downside, you cannot see IR, and it travels only in straight lines.
Definition : A semiconductor device that generates coherent light of high intensity is known as laser diode. Stimulated emission is the basis of working of a laser diode. Coherent radiation means the light waves generated by the device have the same frequency and phase. The figure below shows the basic construction of a laser diode:.
The popularity of fiber optic transmission continues to increase within telecommunication networks around the world, driven by the rise in the demand for higher bandwidth and faster connectivity.
Most Searched Terms
Contemporary Issues in Wireless Communications. FSO is a line-of-sight technology that uses lasers to provide optical bandwidth connections or FSO is an optical communication technique that propagate the light in free space means air, outer space, vacuum, or something similar to wirelessly transmit data for telecommunication and computer networking. Currently, FSO is capable of up to 2. FSO requires light, which can be focused by using either light emitting diodes LEDs or lasers light amplification by stimulated emission of radiation. The use of lasers is a simple concept similar to optical transmissions using fiber-optic cables; the only difference is the transmission media. Light travels through air faster than it does through glass, so it is fair to classify FSO as optical communications at the speed of the light. FSO communication is considered as an alternative to radio relay link line-of sight LOS communication systems.
Communication in space.
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