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Gain dynamics of 14xx-nm-pumped thulium-doped fiber amplifier

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5 Author(s)
Yam, S.S.-H. ; Photonics & Networking Res. Lab., Stanford, CA, USA ; Jaedon Kim ; Marhic, M.E. ; Akasaka, Y.
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Upconversion pumping in the 14xx-nm range gives the thulium-doped fiber amplifier (TDFA) a 3-dB dynamic range of 15 dB, and transient power excursion much lower than the conventional erbium-doped fiber amplifier during dynamic wavelength add-drop, due to the energy transitions inherent to the Tm3+ ion. For specific pumping scheme and operating conditions, gain increases with increasing signal input, a behavior significantly different from conventionally optical amplifiers. This phenomenon is studied experimentally and theoretically, and promises to provide insight for gain control algorithms for TDFAs under bursty traffic conditions in a metropolitan area network environment.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 7 )