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Low noise, all-optical gain controlled Er3+ doped fibre amplifier using asymmetric control laser cavity design

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6 Author(s)
Massicott, J. ; British Telecom Res. Labs., Ipswich, UK ; Lebre, C. ; Wyatt, R. ; Kashyap, R.
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The authors demonstrate an Er3+ doped fibre amplifier with all-optical, automatic gain control and with near quantum limited, 1480 nm pumped noise performance. The amplifier gain is controlled by in-band laser action, and two design considerations are established for optimum noise performance: the control laser wavelength should be located in a region of high amplifier gain, and the laser cavity should be constructed to be as asymmetric as possible, ensuring minimum laser power at the signal input end of the amplifier

Published in:

Electronics Letters  (Volume:32 ,  Issue: 9 )