NDLI: Laterally coupled quantum-dot distributed-feedback lasers

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Laterally coupled quantum-dot distributed-feedback lasers

Content Provider	NASA Technical Reports Server (NTRS)
Author	Maker, paul Wilson, Daniel Stintz Sr., Andreas Qui, Yueming Muller, Richard Gogna, Pawan Lester, Luke
Copyright Year	2003
Description	InAs quantum-dot lasers that feature distributed feedback and lateral evanescent- wave coupling have been demonstrated in operation at a wavelength of 1.3 m. These lasers are prototypes of optical-communication oscillators that are required to be capable of stable single-frequency, single-spatial-mode operation. A laser of this type (see figure) includes an active layer that comprises multiple stacks of InAs quantum dots embedded within InGaAs quantum wells. Distributed feedback is provided by gratings formed on both sides of a ridge by electron lithography and reactive-ion etching on the surfaces of an AlGaAs/GaAs waveguide. The lateral evanescent-wave coupling between the gratings and the wave propagating in the waveguide is strong enough to ensure operation at a single frequency, and the waveguide is thick enough to sustain a stable single spatial mode. In tests, the lasers were found to emit continuous-wave radiation at temperatures up to about 90 C. Side modes were found to be suppressed by more than 30 dB.
File Size	40401
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110024102
Archival Resource Key	ark:/13960/t51g5nj1q
Language	English
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Man/system Technology And Life Support Evanescent Waves Quantum Dots Frequencies Continuous Radiation Oscillators Indium Gallium Arsenides Reactivity Lasers Semiconductors Materials Prototypes Optical Communication Waveguides Distributed Feedback Lasers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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