Title :
Proposal for quantum-dot electroabsorption modulator
Author :
Sahara, Richard ; Matsuda, M. ; Shoji, H. ; Morito, K. ; Soda, H.
Author_Institution :
Fujitsu Labs. Ltd., Atsugi, Japan
Abstract :
Quantum-dot, electroabsorption materials are proposed to obtain low internal loss, large absorption modulation, and negative alpha parameters (blue chirped pulses). These characteristics come from the discrete state absorption associated with three dimensional confinement in quantum dots compared to the band absorption of quantum well, quantum wire, and bulk materials. In addition, type II quantum-dot structures are also proposed to obtain the same optical modulation characteristics with the potential for greater immunity to saturation effects.
Keywords :
chirp modulation; electro-optical modulation; electroabsorption; optical communication equipment; optical losses; optical saturation; semiconductor quantum dots; band absorption; blue chirped pulses; discrete state absorption; large absorption modulation; low internal loss; negative alpha parameters; optical modulation characteristics; quantum-dot electroabsorption modulator; saturation effects immunity; three dimensional confinement; type II quantum-dot structures; Absorption; Chirp modulation; Optical materials; Optical modulation; Optical pulses; Potential well; Proposals; Pulse modulation; Quantum dots; Wire;
Journal_Title :
Photonics Technology Letters, IEEE
