WIRELESS VOICE COMMUNICATION USING LASER Thiyagarajan.k ECE Dept, AMScollege of eng.,, Chennai, India
[email protected]
Fiber Fiber optic optic commun communicat ication ion has a transmitter and a receiver end, connected by vital action that every living being on this earth mean meanss of a cabl cablee that that has has mirr mirror orss or refle reflect ctin ing g does. This project is to take communication to the next economic level, which is very much needed for medium inside and throughout it. The light from one end is transmitted transmitted through through the fiber optic cable the present scenario. Laser voice communication is and it is received at the other end without any loss. a wireless communication that replaces the present fiber optic communication and gives us the greatest advantage of INFINITE DISTANCE WIRELESS OUR IDEA: COMMUNICATION. My idea is to replace this fiber optic Keywords - point to point communication, Total cable by means of a laser and to make the system wireless. I replaced this costly fiber optic cable by Internal Reflection, means of a cheap laser source. This reduces the system cost; this makes the system simple and the PRESENT SCENARIO: At present we have fiber optic communication that most reliable. is the most proffered means of communication. All The range of this communication is telephones broadband use fiber optic much more than that of the fiber optic modes and it communication method. depends on the range of the laser source being used . in the system. This laser voice communication is PRINCIPLE: best suited for the point to point communication. The basic principle behind the fiber optic communication is “total internal reflection” . By this principle the light transmitted at one end of PRINCIPLE: the cable that has mirrors inclined inside undergoes My system follows the principle of multiple reflections and reach the other end. “law of conservation of energy”.
Abstract — Communication is the important and
The law of conser conservat vation ion of energy energy states that “energy can neither be created nor destroyed; it can can only only be tran transf sfor orme med d from from one one form form to another”.
CIRCUIT DESCRIPTION: The circuit consists of two ends. TRANSMITTER END
FIBER OPTIC COMMUNICATION: COMMUNICATION:
RECIEVER END
Components Listing:
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Resistors 1/4W, 5%: 100R (brown, black, brown) brown) 1K (brown, black, red) 10K (brown, black, orange) 22K (red, red, orange) 100K (brown, black, yellow) 220K (red, red, yellow) 680K (blue, grey, yellow) 1M (brown, black, green) 100K Koa trimpot Capacitors 10 uF electrolytic 2 100 uF electrolytic 1 0.1 uF monoblock (104) 5
TRANSMITTER END: The transmitter end has the micr microp opho hone ne that that recei receive vess the the soun sound d sign signal al and and converts into the equivalent electrical signal. This electrical electrical signal, signal, after proper signal signal condition conditioning ing is then converted into the laser beam, by switching the laser source. This laser is then transmitted to the receiver end. The transistor acts as the safety device for the circuit in order to avoid the over voltage and malfunctioning of the circuit.
This elect ectrical energy rgy afte fter proper signal cond condit itio ioni ning ng,, it is fed to the the loud loudsp spea eake ker. r. The The loud loudsp spea eake kerr conv convert ertss the the elec electri trical cal ener energy gy into into equivalent sound energy. Thus sound is transmitted from one end to another end. The voltage regulator, here acts as the safety or switching device in order to avoi avoid d dama damage ge to the the circu circuit it durin during g the the over over voltage.
ADVANTAGES: Range is infinity • •
Low cost and reliable
•
Wireless means of communication
•
More efficient communication
than
the
fiber
optic
CONCLUSION:
Thus how this this las laser voic voicee communication takes the communication mode to the next level is discussed clearly.
REFERENCES:
Op-A Op-Amp mp and and David.A.Bell.
Linea inearr
Inte Integr grat ated ed
Circ Circui uits ts,,
by
Free-Space Laser Communications: Principles And Advances by Jennifer C. Riclkin
RECIEVER END: The receiver end has a pho photo totr tran ansi sist stor or,, a ligh lightt sens sensin ing g devi device ce,, whic which h converts the rec received light energy into an equivalent electrical energy.
