The importance of lasers in communication and advantages of fiber optics cables

Lasers in communication

Communication in space

Communication in space

Laser communications systems are wireless connections through the atmosphere ,  the light speed is the fastest speed than anything can travel , so laser communications and laser sensing are important in mortar  defense and other crucial aerospace and defense applications .

Lasers are able to see through the dense foliage, and they  can allow for space communication from distances measured in millions of miles , We use lasers everywhere such as in the military systems , the avionics , and in submarines .

Laser communications are better than radio as light wavelengths are packed much more tightly than the sound waves , and they transmit more information per second with a stronger signal .

We send and receive data , video and other information , using lasers to encode and transmit data at rates 10 to 100 times faster than radio , Laser is a very intense , concentrated , highly parallel and monochromatic beam , and coherence is very importance property of laser .

Lasers  have been used in communications for years , and We can transfer information by lasers every day such as reading CDs and DVDs , and we can scan bar codes at checkout lines or tapping the fiber optic backbone of phone or internet services .

Laser communications systems  can be easily deployed because they are inexpensive and small , They have low power and they do not require any radio interference studies , Data exchange is relatively easy to combine with accurate range metering which is essential in many applications .

Lasers communications are solutions to satisfy  increasing bandwidth needs , and laser communication systems can transmit speeds of up to a gigabit per second , Laser communications assure much faster data traffic at lower power consumption , smaller  geometrical size and much higher immunity to eavesdropping .

The advantages of fiber optics cables

Optical fiber

Optical fiber

The optical fibers are thin strands of glass through which a laser beam can travel for several miles , and laser amplifiers are needed only every six or seven miles to strengthen the light signal .

One of the advantages of the laser fiber optics is that several fibers can be wrapped inside one cable , and each cable contains many laser beams , each  carrying billions of bits of information .

Multiple signals can be sent with high quality and low loss by light propagating along the fibers , and  the lasers  are more nearly monochromatic and this allows the pulse shape to be maintained better over long distances .

The optical signals are sent at infrared wavelengths of 1.3 to 1.6 micrometres , the glass fibers are most transparent .

Applications on the total reflection of light ( Optical fibers , Reflecting prism & Mirage )

The advantages and disadvantages of optical fiber cables over electrical cables

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