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Noise characteristics of Er/sup 3+/-doped fiber amplifiers pumped by 0.98 and 1.48 mu m laser diodes

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7 Author(s)
Hamada, M. ; NTT Opto-Electron. Lab., Ibaraki, Japan ; Shimizu, M. ; Okayasu, M. ; Takeshita, T.
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Measured noise characteristics of Er/sup 3+/-doped optical fiber amplifiers pumped by 0.98- and 1.48- mu m laser diodes (LDs) are reported. The noise figures estimated from the beat noise between signal and spontaneous emission are 3.2 dB for pumping by 0.98- mu m LD and 4.1 dB for pumping by 1.48- mu m LD. The beat noise between spontaneous emission components and the spontaneous shot noise for the 0.98- mu m pumping are lower than those for the 1.48- mu m pumping.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:2 ,  Issue: 3 )

Date of Publication:

March 1990

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