DocumentCode :
2277003
Title :
Ultrafast signal processing in quantum dot amplifiers through effective spectral holeburning
Author :
Berg, T.W. ; Mork, Jesper ; Uskov, A.V.
Author_Institution :
Res. Center COM, Tech. Univ. Denmark, Lyngby, Denmark
fYear :
2002
fDate :
24-24 May 2002
Abstract :
Summary form only given. Significant progress has been obtained on quantum dot (QD) lasers, but the possible advantages of QD amplifiers are not yet clear. We show here that a relatively slow coupling between the optically active QD carrier states and the surrounding carrier reservoir can lead to efficient gain modulation suitable for ultrafast signal processing. The basis of this property is that the process of spectral hole burning (SHB) can become very effective. We consider a traveling wave optical amplifier consisting of the dot states, which interact with the optical signal (no inhomogeneous broadening included), and the wetting layer (WL), where current is injected. Time evolution is described by two coupled rate equations. Carrier capture from WL to dots is characterized by the capture time /spl tau//sub 0/.
Keywords :
high-speed optical techniques; laser theory; optical hole burning; optical information processing; optical modulation; quantum dot lasers; semiconductor optical amplifiers; capture time; carrier capture; coupled rate equations; dot states; effective spectral holeburning; efficient gain modulation; optical signal; optically active QD carrier states; quantum dot amplifiers; relatively slow coupling; spectral hole burning; surrounding carrier reservoir; time evolution; traveling wave optical amplifier; ultrafast signal processing; wetting layer; Optical amplifiers; Optical coupling; Optical modulation; Optical signal processing; Quantum dot lasers; Quantum dots; Reservoirs; Signal processing; Stimulated emission; Ultrafast optics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-706-7
Type :
conf
DOI :
10.1109/CLEO.2002.1034452
Filename :
1034452
Link To Document :
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