Increase of Transmission Distance Using Edfa and Module Design for Free Space Optics Applications

Abstract

Free-space optical (FSO) communications, also known as wireless optical communications, is a cost-effective and high bandwidth access technique and has compelling economic advantages. With the potential high-data-rate capacity, low cost and particularly wide bandwidth on unregulated spectrum, FSO communications is an attractive solution for the “last mile” problem to bridge the gap between the end user and the fiber-optic infrastructure already in place. However, also other structural conditions atmospheric losses fairly affect the signal gain communication due to the fact that communication medium is an air. In this study, a FSO component is designed using Matlab software for geometrical and atmospheric losses and integrated into OptSim 4.0 software to analyze the FSO system. Somewhat apart, signal attenuations due to the atmosphere conditions are eliminated using Erbium Doped Fiber Amplifier (EDFA). In this way, signal transmission distance is increased in comparison with the traditional FSO systems.

 

 

 

                Key Words: Free space optics, component design,

                                     EDFA, transmission distance

 

Keywords

• Free space optics, component design, EDFA, transmission distance

References

1. Bloom, S., “The Physics of Free Space Optics”, White Paper, AirFiber , Inc., (2001).
2. Bloom, S., “The Last Mile Solution: Hybrid FSO Radio”, White Paper, AirFiber , Inc., (2002).
3. Ramasarma, V., “Free Space Optics: A Viable Last- Mile Solution”, Bechtel Telecommunications Technical Journal, 1(1): 22-30 (2002).
4. Bloom, S., Korevaar, E., Schuster, J., Willebrand, H., “Understanding the Performance of Free-Space Optics”, Journal of Optical Networking, 2(6):178- 200 (2003).
5. Szebesta, D., “Free Space Optical Communication,” White Outsourcing, COLT Telecom, (2002). and System
6. LighPointe Communications Corp., “Free Space Optics: A Viable Last-Mile Alternative”, White Paper, (2002).
7. Karatay, O., Dinleyici, M.S., “Low-cost Free-Space Optical Communication System Design”, Signal Processing and Communications Applications Conference, Proceedings of the IEEE 12th, 700- 703 (2004).
8. Gagliardi, S.M., Karp, S., “Optical Communications”, Wiley-Interscience, 2nd Edition, New York, 368 (1995). [9] Lambert, S.G., Casey, Communications in Space”, Artech House, Boston, 390 (1995). W.L., “Laser

9. Akbulut, A., Özek, F., “Serbest ortamda lazer ile optiksel simülasyonu”, J. Fac.Eng.Arch. Selcuk Univ., 20(4):27-38 (2005). için bilgisayar
10. Saleh, A.A.M., Jopson, R.M., Evankow, J.D., Aspell, J., “Modeling of gain in erbium doped fiber amplifiers”, IEEE Photonics Technology Letters, 2(10):714-716 (1990).
11. Chapman, D.A, “Erbium-doped fibre amplifiers: the latest revolution in optical communications”, Electronics&Communication Journal, 6(2):59-67 (1994). Engineering
12. Yücel, M., Göktaş, H.H., “Design of gain flattened ultra-wide band hybrid optical amplifier”, J. Fac. Eng. Arch. Gazi Univ., 22(4):863-868 (2007).
13. Yücel, M., Göktaş, H.H., “The effect of pumping wavelength and directions on the erbium doped fiber amplifiers gain of EDFA”, Journal of Polytechnic, 6 (4):627-635 (2003).
14. Yamada, M., “Overview of wideband optical fiber amplification Review, 2(12): 34 (2004). NTT Technical
15. Sakamoto, T., Mori, A., Masuda, H., Ono, H., “Wideband rare-earth-doped fiber amplification technologies – Gain bandwidth expansion in the C and L bands”, NTT Technical Review, 2(12): 38 (2004). [17] Yucel, M., Goktas, H.H., Celebi, F.V., “Temperature independent length optimization of L- band EDFAs providing flat gain”, Optik - Int. J. Light Electron Opt., 122(10): 872-876 (2011).
16. OptiSim Version 4.0; “Design and Validate Your Optical Transmission Systems”, (Copyright © 2004 RSoft Design Group, Inc.), (2004).
17. Tjondronegoro, P., “Free Space Optics for Fixed Wireless Broadband”, Seminar in Communications Engineering, (2004).
18. Galtier, S., Nazarenko, S.V., Newell, A.C., Pouquet A., “A Weak Turbulence Theory for Incompressible Magnetohydrodynamics”, J. Plasma Physics, 63(5):447-488 (2000).
19. Hansel, G., Kube, E., “Simulation in the Design Process of Free Space Optical Transmission Systems”, Proc. 6 th Workshop “Optics in Computing Technology, 45-53 (2001).
20. Becker, P.C., “Erbium-Doped Fiber Amplifiers: Fundamentals and Technology”, Chapter 7, Academic Press, (1999).