Erbium Doped Fiber Lasers for Long Distance Communication Using Network of Fiber Optics
American Journal of Optics and Photonics
Volume 3, Issue 3, June 2015, Pages: 34-37
Received: Jul. 21, 2015; Accepted: Jul. 28, 2015; Published: Aug. 11, 2015
Views 6145      Downloads 156
Thalangunam Krishnaswamy Subramaniam, Department of Science & Humanities (Physics), Sri Sairam Engineering College, Chennai, India
Article Tools
Follow on us
A fiber doped with erbium laser is used in long distance communication over networks of fiber optics. Especially, in under water communication links where optical signals can be amplified by joining erbium-doped fiber at appropriate locations in the network of the fiber. Thus, a signal, when optically transmitted will get amplified and this will be useful when the signal travels between continents. There is no need for converting an optical signal into an electrical signal, amplified and then reintroduced into the fiber for transmission. The latest research trend is to produce ultra-short pulse widths of the order of 100fs and with a pulse repetition rate of the order of 10GHz. Here I have used an Er3+ doped silica fiber for optical pumping λ=0.98µm or λ=1.48µm wavelength using radiation from a diode laser [Fig. 1]. A coupler was used to select the wavelength, which permits this light to reach the optical fiber transmission system, without disturbing the signal. The optical fiber is spliced into the transmission lines, which acts as an optical isolator. This fiber is constantly pumped by the diode laser. When the pulses pass through the system, they get amplified, while the pump light is reduced.
Fiber Optics, Erbium-Doped, Spliced, Pulse Repetition Rate, Optical Isolator
To cite this article
Thalangunam Krishnaswamy Subramaniam, Erbium Doped Fiber Lasers for Long Distance Communication Using Network of Fiber Optics, American Journal of Optics and Photonics. Vol. 3, No. 3, 2015, pp. 34-37. doi: 10.11648/j.ajop.20150303.11
Digonnet M.J.F., “rare-Earth doped fiber lasers and amplifiers”, Marcell Dekker, New York, 2001.
Khare.R.P, “Fiber optics and optoelectronics”, Oxford University Press, India.
Mears R.J.L, Reekie I.M, Jauncey and Payne D.N., “Low-noise erbium-doped fiber amplifier operating at 1.54mm. “Electron Letters” 23, pp1026, 1987.
Amnon Yariv, Pochi Yeh, “Photonics” 6th Edition, Oxford University Press, New York.
Nambiar.K.R, “Laser Principles and Applications”, New Age International (P) Limited, Publishers, New Delhi-110002.
Keiji Kuroda, Ayako Suzuki, Yuzo Yoshikuni “Control and probe of population inversion using nanosecond pulse trains in an erbium-doped fiber amplifier”, Volume 20, Issue 5, October 2014, Pages 483–486 doi:10.1016/j.yofte.2014.05.014.
Edgar A. Peralta, Alireza Marandi, and Charles Rudy “Erbium-Doped Fiber Amplifier and Laser”,
Polman.A, “Erbium as a probe of everything?”Physica B: Condensed Matter, Volume 300, Issues 1–4, 1 July 2001, Pages 78–90, doi: 10.1016/S0921-4526(01)00573-7.
Desurvire.E,”Erbium doped fiber amplifiers: Principles and Applications”, John Wiley & Sons, New York.
Sze.S.M, “Physics of semiconductor devices”, John Wiley, New York, 1981.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186