American Journal of Applied Sciences

Intensity Position Modulation for Free-Space Laser Communication System

F. Faghihi and A. Jangjoo

DOI : 10.3844/ajassp.2005.1178.1181

American Journal of Applied Sciences

Volume 2, Issue 7

Pages 1178-1181


In this study a novel analog modulation-demodulation technique for free-space laser communication system called Intensity Position Modulation (IPM) is carried out. According to TEM00 mode of a laser beam and by linear fitting on the Gaussian function as an approximation, the variation of the linear part on the reverse biased pn photodiode produced various currents. Our simulated results show fine response bandwidth and fidelity of the analog communication system, is made upon the present method, is satisfactory. According to the present method, we are able to transmit the audio signals up to 1 Km.


© 2005 F. Faghihi and A. Jangjoo. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.