TITLE

Delta doping superlattice structures for amplitude modulators: Observation of the Stark effect and improvement of the chirp

AUTHOR(S)
Tribuzy, C.V.-B.; Pires, M.P.; Landi, S.M.; Borgström, M.; Souza, P.L.
PUB. DATE
April 2004
SOURCE
Applied Physics Letters;4/26/2004, Vol. 84 Issue 17, p3256
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A Stark shift for a GaAs/AlGaAs multiple quantum well structure containing a nipi delta-doping superlattice is observed. Photocurrent measurements revealed a Stark shift that varied with increasing applied electric field, from being equivalent to that of an undoped structure to 30% below. Even though these values are still below those predicted theoretically, they demonstrate the possibility of fabricating amplitude modulators using these novel structures. Furthermore, the obtained chirp parameter is within the desired [-1,0] range for long-distance optical communication, contrary to the high positive values for the undoped structure, showing that such device may have a better overall performance. © 2004 American Institute of Physics.
ACCESSION #
12879387

 

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