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Performance predictions from a new optical amplifier model

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3 Author(s)
Henning, I.D. ; British Telecom Research Labs., Mantlesham Heath, Ipswich, England ; Adams, M.J. ; Collins, J.

We present results of a new model of semiconductor laser amplifiers which differs from previous analyses in that it includes the spectral dependence of material gain and spontaneous emission. The implications of low facet reflectivities are explored in some detail. For reflectivities below about 1 percent, the increased spontaneous emission imposes more stringent limits on current density than realized hitherto. If thermal runaway is to be avoided and gains in the range of 20-30 dB are to be achieved without excessive currents, then facet reflectivities on the order of 0.1-1 percent are probably optimal. Another consequence of including the spectral dependence is that wavelengths longer than that corresponding to the unsaturated gain peak are predicted to experience enhanced amplification at high input powers by comparison to shorter wavelengths.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:21 ,  Issue: 6 )

Date of Publication:

Jun 1985

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