Influence of spontaneous frequency fluctuations on lineshape of semiconductor laser modulated by a pseudorandom pumping current

The lineshape of a single-mode semiconductor laser is studied numerically for fast pseudorandom current modulation. We analyze the contribution of frequency fluctuations originated from spontaneous emission to the laser spectrum. The expression is derived for the nonstationary phase increment determ...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2003-10, Vol.39 (10), p.1211-1215
Main Author: Morozov, Y.A.
Format: Article
Language:English
Subjects:
Chirp modulation
Fluctuation
Fluctuations
Frequency
Laser excitation
Laser noise
Lasers
Mathematical models
Modulation
Optical noise
Pseudorandom
Pump lasers
Semiconductor device noise
Semiconductor lasers
Spectral emissivity
Spontaneous emission
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Description
Summary:The lineshape of a single-mode semiconductor laser is studied numerically for fast pseudorandom current modulation. We analyze the contribution of frequency fluctuations originated from spontaneous emission to the laser spectrum. The expression is derived for the nonstationary phase increment determining the influence of frequency noise on the lineshape. The obtained results show that spectral characteristics of laser radiation substantially depends on the spontaneous emission factor as well as on parameters of modulation.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2003.817238