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Intensity dependence of the transparency current in InGaAsP semiconductor optical amplifiers

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6 Author(s)
G. T. Kennedy ; J.F. Allen Phys. Res. Labs., Univ. of St. Andrews, Fife, UK ; P. D. Roberts ; W. Sibbett ; D. A. O. Davies
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Summary form only given. Recently there has been considerable interest in ultrafast gain and refractive index nonlinearities in InGaAsP semiconductor amplifiers at wavelengths around 1.5 /spl mu/m. In particular, when an amplifier is biased at transparency such that a pulse propagating through it experiences no net gain or absorption, a large non-linearity having a recovery time of a few picoseconds has been measured. In this paper measurements of the transparency using the pump-probe method were compared to the optoelectronic signal method. Some discrepancies were observed and these are discussed together with the implications of the intensity-dependent transparency current for all-optical switching.

Published in:

Lasers and Electro-Optics, 1996. CLEO '96., Summaries of papers presented at the Conference on

Date of Conference:

2-7 June 1996