CAPSTONE PROJECT REPORT
ON
“Data And Voice Communication Using Laser”

Submitted in partial fulfilment of the requirement for the award of
Degree of
Bachelors Of Technology(ECE)
By
Samridhi Wazir(11013482)
Sandeep Kaur (11002003)
|Kapil Yadav ( 11012903)
Mukesh Kumar(11008775)
Lakhan Singh (11009628)
Under the Guidance of
Amandeep Kaur
Assistant Professor
UID: 18350
Discipline of Electronic And Communication
Lovely faculty Of Sciences
Lovely Professional University, Phagwara
(January to May, 2014)

CANDIDATE DECLARATION
We hereby declare that the work, which is being presented in the report, entitled “Data And
Voice Communication Using Laser”, in partial fulfilment of the requirement for the award of the Degree of Bachelor of Technology submitted to the institution, is an authentic record of our own work carried out during the period Jan-2014 to April 2014. We also cited the reference about the text/figure(s)/table(s) from where they have been taken.

Samridhi Wazir
Registration No: 11013482

(Signature of Student)

Sandeep Kaur
Registration No: 11002003

(Signature of Student)

Kapil Yadav
Registration No: 11012903

(Signature of Student)

Lakhan Singh
Registration No: 11009628

(Signature of Student)

Mukesh Kumar
Registration No: 11008775

(Signature of Student)

i

CERTIFICATE
I hereby certify that the work presented in the project report entitled ‘data and voice communication using laser’, in partial fulfilments of the requirements for the award of the bachelor of technology in electronics & communication engineering and submitted to them department of Electronics & Communication Engineering of Lovely Faculty of
Science & Technology, Lovely Professional University, Jalandhar, Punjab is an authentic th th

record of their own work carried out during the period from 15 January to 20 April.

This is to certify that the above statement(s) made by the students is correct to the best of my knowledge. Signature of supervisor
(Miss Amandeep Kaur)
Assistant Professor
Date:

Assistant professor
Miss Amandeep Kaur

ii

ABSTRACT
In past radio frequency signals were the mere source of data transfer but due to improved technology in communications fields recent times created new dimensions in the field of wireless communications. Any electrical and electronic system that is operated without the involvement of the wired connections (conductors) are termed as wireless. In this project
“Data and Voice communication using LASER” designing of the proposed circuit, and development of new ideas in this concerned field is discussed. In this project the detail study of the entire circuitry and different types of components used in this circuit is explained.

The active medium in this process is the laser which is the main source for the transmission of the information the choice of laser should have the following properties like being highly monochromic and coherent.

This project report describes about two major units one is transmitter unit and other is receiver unit. The transmitter modulates the signal into optical signal with the help of the lasers and transmits the signals through air. In the receiver section a highly sensitive receiver is employed for speech, bandwidth, modifications which decodes the optical information into the required audio signal by the help of audio amplifier and photo transistor.

This photo transistor gains information from the light signals and feeds to the amplifier which amplifies the signal and passes to the speaker. The complete circuit description and its operation along with modified results are mentioned in this paper. While considering the advantages, this system is very improved in the areas like maintaining secrecy, high audio quality. Privacy in communications is facilitated by using automatic sensor systems. This technique is adopted for interior or exterior communications over a wide range of distances.

iii

ACKNOWLEDGEMENT
“If practical knowledge carves and sharps the career of a person,