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Dual-wavelength (1050 nm +1550 nm) pumped thulium-doped fiber amplifier characterization by optical frequency-domain reflectometry

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5 Author(s)
Martins-Filho, J.F. ; Dept. de Eletronica e Sistemas, Univ. Fed. de Pernambuco, Recife, Brazil ; Bastos-Filho, C.J.A. ; Carvalho, M.T. ; Sundheimer, M.L.
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We present experimental results of distributed gain measurements from a dual-pumped (1050 nm +1550 nm) thulium-doped fiber amplifier using optical frequency-domain reflectometry. We show that significant reductions in total pump power and/or fiber length are realized with the addition of a few milliwatts at 1550 nm. For our experimental conditions, the addition of 5 mW of 1550 nm allows for a reduction of 100 mW of pump power at 1050 nm or a reduction of 44% of doped fiber length to reach the same gain as with 1050-nm pumping alone.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 1 )