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Proceedings Paper

Design of semiconductor optical amplifier with four level Y-type QD, for cancelling absorption and achieving amplification
Author(s): Sh. Rahmatollahpur; R. Sadighi-Bonabi
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Paper Abstract

Lasing and amplification without inversion and electromagnetically induced transparency are of interesting phenomena in interaction of light with mater. According to this theory if a laser beam propagates in a medium with the photon frequency that is same as the frequency of medium resonant, the medium will absorb the photon. But if two or three laser beams propagate in the same material, in the specific condition it is possible not only to cancel the absorption but also to amplify the probe signal.in this paper the equations of Lasing without inversion is derived , the Schrodinger equations for a quantum dot (QD) with GaN / InxGa1-xN structure is solved and the energy levels and wave functions are obtained for a four level Y-type system in this QD is designed. the interactions of external fields with four level Y-type QD are investigated. It is shown that the proper adjustments of magnitudes, Rabi phases and frequencies of the applied fields, not only can cancel the absorption but also achieve amplification in the probe signal. Also with proper choices of applied fields and detunings of QD levels we can have amplification and dispersion compensation in probe signal simultaneously.

Paper Details

Date Published:
PDF: 8 pages
Proc. SPIE 7720, Semiconductor Lasers and Laser Dynamics IV, 77201X; doi: 10.1117/12.854300
Show Author Affiliations
Sh. Rahmatollahpur, Sharif Univ. of Technology (Iran, Islamic Republic of)
R. Sadighi-Bonabi, Sharif Univ. of Technology (Iran, Islamic Republic of)


Published in SPIE Proceedings Vol. 7720:
Semiconductor Lasers and Laser Dynamics IV
Krassimir Panajotov; Marc Sciamanna; Angel A. Valle; Rainer Michalzik, Editor(s)

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