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- W2040299953 abstract "Theoretical and experimental results concerning the study of a novel wavelength converter amplifier, which can be tuned, with the amplification of an external voltage are presented. The device consists of a Ga1-xAlxAs graded quantum well, placed on the n-side of the depletion region of a Ga1-xAlxAs p-n junction. As a result of the competition between the built-in field and the grading, in the absence of an external bias, the quantum well acts as an isolated well. Forward biasing of the junction reduces the built-in field; thus the field associated with the grading becomes effective. The tuning of the operation wavelength is based on the anti-Quantum Confined Stark Effect and achieved during the forward biasing. In this study we present the numerical results based on a 2D modeling of the device where exciton binding energy, absorption co-efficient and transition energy are obtained as a function of applied field. Experimental results show a tuning range of around 40nm.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only." @default.
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- W2040299953 date "2001-07-09" @default.
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- W2040299953 title "Nonlinear dynamics in a graded quantum well placed in a GaAlAs p-n junction" @default.
- W2040299953 doi "https://doi.org/10.1117/12.432622" @default.
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