Author/Authors :
HARUN, S. W. university of malaya - Faculty of Engineering - Department of Electrical Engineering, Malaysia , DIMYATI, K. university of malaya - Faculty of Engineering - Department of Electrical Engineering, Malaysia , TAMJIS, M. R. university of malaya - Faculty of Engineering - Department of Electrical Engineering, Malaysia , MUHD-YASSIN, S. Z. MARA University of Technology - Faculty of Applied Science, Malaysia , ABDRAHMAN, M. K. MARA University of Technology - Faculty of Applied Science, Malaysia , AHMAD, H. university of malaya - Department of Physics, Malaysia
Abstract :
An efficient Erbium/Ytterbium doped fiber amplifier (EYDFA) is demonstrated using a 1058 nm pumping wavelength, where the amplification is assisted by the energy transfer between the Yb and Er ions. This energy transfer process allows a higher erbium doping concentration as opposed to the conventional erbium doped fiber. Therefore, the gain and noise figure is severely degraded with 1480 nm pumping, where the energy transfer cannot be achieved. The use of an optical isolator improves the small signal gain and noise figure by about 4.8 dB and 1.6 dB, respectively. By employing a double-pass configuration, higher gain can be obtained at an expense of a noise figure penalty. A gain improvement of 17.0 dB is obtained at a 20 mW and -50 dBm pump and input signal power. This indicates that the double-pass configuration is an important approach in designing an efficient EYDFA.
Keywords :
EYDFA , power amplifier , Er , Yb doped fiber amplifier
