Optical and Electrical Properties of Novel Quantum Dot Lasers and Amplifiers
Kim, Jung Ho
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https://hdl.handle.net/2142/80958
Description
Title
Optical and Electrical Properties of Novel Quantum Dot Lasers and Amplifiers
Author(s)
Kim, Jung Ho
Issue Date
2006
Doctoral Committee Chair(s)
Chuang, Shun-Lien
Department of Study
Electrical and Computer Engineering
Discipline
Electrical and Computer Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
In the case of the tunneling injection InP QD FP laser, a particular transverse-electric (TE) gain narrowing and transverse-magnetic (TM) gain pinning is measured below threshold. A polarization-dependent photon-mediated carrier redistribution with the coupled rate equation model is proposed to explain this unique optical gain evolution behavior. To experimentally demonstrate the proposed polarization-dependent photon-mediated carrier redistribution, the TE modal optical gain spectra of the tunneling injection QD laser with the grating-based external cavity are measured. The measured TE gain narrowing spectra are changed by tuning the external feedback wavelength. On the other hand, a typical band-filling behavior without gain narrowing is observed from the measured modal optical gain spectra of a QW laser both with and without the external optical feedback.
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