Research Article Open Access

Intensity Position Modulation for Free-Space Laser Communication System

F. Faghihi1 and A. Jangjoo1
  • 1 Department of Nuclear Engineering, School of Engineering, Shiraz University 71345, Shiraz, Iran


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.

American Journal of Applied Sciences
Volume 2 No. 7, 2005, 1178-1181


Submitted On: 3 July 2005 Published On: 31 July 2005

How to Cite: Faghihi, F. & Jangjoo, A. (2005). Intensity Position Modulation for Free-Space Laser Communication System. American Journal of Applied Sciences, 2(7), 1178-1181.

  • 2 Citations



  • TEM00 mode
  • modulation
  • laser communication
  • gaussian profile
  • analog communication
  • intensity