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Semiconductor mirror for optical noise suppression and dynamic dispersion compensation

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4 Author(s)
Isomaki, A. ; Optoelectronics Res. Centre, Tampere Univ. of Technol., Finland ; Vainionpaa, A.-M. ; Lyytikainen, J. ; Okhotnikov, O.G.

We report on a monolithic Gires-Tournois semiconductor interferometer used for both suppression of low-intensity spontaneous noise in a high-power fiber amplifier and to generate a tunable delay. The potential of the noise suppression technique was demonstrated using a two-stage amplifier system. Gain improvement by a factor of five illustrates the capability of semiconductor gates to greatly enhance energy extraction from optical amplifiers. We demonstrate also that controllable saturable absorption in an optically pumped multiple-quantum-well semiconductor reflector provides promising means for rapidly changing the group delay of the reflector and represents a new form of dynamic dispersion compensator.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 11 )