Laser Based Digital Data Communicator

Introduction

Semiconductor laser communicator offers a low cost, short-range, secure infrared data communication for transmission of computer and telemetry data. This can be easily installed in short notice provided transmitter and receiver can see each other. The system consists of two sets of transceivers units, which can transmit 10K bits/sec of digital information for a range of 1.5 km.

Each transmitter emits IR pulses of 200nsec duration with peak power of 4W. At the receiver end, the light pulses are focused on a photodiode with the help of suitable optics, which converts them into electrical pulses. These pulses are further processed for interfacing with the computer. The data is exchanged at two ends without laying any cable. Due to unique property of very low divergence of laser beam, the system offers secure communication of data as compared to radio link.

Specifications

• High security and privacy of communication
• Quick & easy installation
• Low power consumption
• Point to point communication
• Full duplex link
• Maximum range in fair weather - 1.5 km
• Free from EM/RF interference
• No licensing required
• Alignment of units with sighting telescope

Application

For secure data communication in Defence and sensitive areas, at Airports for communication across the runways, for Telemetry data and Remote Control. It can also be used in Industries, Research Laboratories, Hospitals etc. for local area networks and computer peripheral remoting.

For further information please contact :

Head,
Technology Transfer & Collaboration Division,
Bhabha Atomic Research Centre,
Trombay, Mumbai - 400 085
Tel : 091-022-25505337/25593897
Fax : 091-022-25505151
E-mail : headttcd@barc.gov.in