Performance study on double cladding Er-Yb co-doped fiber amplifiers with a reflector
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1.
Xi'an Communication Institute, PLA, Xi'an 710106, China;
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2.
Institute of Telecommunication Engineering, AFEU, Xi'an 710077, China
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Received Date:
2003-04-04
Accepted Date:
2003-08-14
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Abstract
Based on rate and propagation equations,the output signal power and noise characteristics of double cladding erbium-ytterbium co-doped fiber amplifiers with a reflection are analyzed numerically. Due to the contributions of the reflector to reflect the un-absorbed pump power,pump light transmitted in the active fiber is increased and the output performances are improved.It is shown that the amplifiers with the reflector only using half-lengths of fiber have about the same high power output signal as those without reflectors,for forward pumping and backward pumping,noise figures are obtained less than 4dB.
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