Spontaneous emission induced filamentation in flared amplifiers

We present a propagation model for the steady-state properties of InGaAs QW flared laser amplifiers. Included in this analysis are diffusion, diffraction, carrier induced antiguiding, current spreading, gain spatial hole burning, gain compression and spontaneous emission. By monitoring the progress...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1996-05, Vol.32 (5), p.784-789
Main Authors: Ramanujan, S., Winful, H.G.
Format: Article
Language:English
Subjects:
Efficiency, stability, gain, and other operational parameters
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser feedback
Laser modes
Laser optical systems: design and operation
Laser stability
Optical amplifiers
Optical beams
Optics
Physics
Power lasers
Pulse amplifiers
Resonators, cavities, amplifiers, arrays, and rings
Semiconductor laser arrays
Spontaneous emission
Surface emitting lasers
Wave optics
Wave propagation, transmission and absorption
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Description
Summary:We present a propagation model for the steady-state properties of InGaAs QW flared laser amplifiers. Included in this analysis are diffusion, diffraction, carrier induced antiguiding, current spreading, gain spatial hole burning, gain compression and spontaneous emission. By monitoring the progress of the field, as well as the carrier density, we show that spontaneous emission, coupled with gain spatial hole burning, can result in filamentation of the amplifier output. This mechanism is in addition to other phenomena such as thermal effects and reflective feedback which have been shown to cause filamentation.
ISSN:0018-9197
1558-1713
DOI:10.1109/3.493001