Journal ArticleDOI
Mode Partition Noise In Nearly Single Mode Lasers With Multiple Side Modes
S. Lakshmanasamy,S. S. Mitra +1 more
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In this paper, the power penalty estimation for fiber optic communication due to mode partition noise in nearly single-mode laser is discussed and the combined distribution of the dropout rate for n side modes is derived.Abstract:
The power penalty estimation for fiber optic communication due to mode partition noise in nearly single mode lasers is discussed. Nearly single mode lasers are modeled here as those with a single dominant mode and n side modes with significant strength. The dropout rate of each side mode obeys exponential distribution. The combined distribution of the dropout rate for n side modes is derived here. This distribution is combined with the statistically independent Gaussian receiver noise in estimating error probability and hence the power penalty. Calculations show that to ensure a 10 -12 error rate, the ratio of the main mode to the side modes must be greater than 57:1 for one side mode and greater than 67:1 for two side modes.read more
Citations
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Journal ArticleDOI
On the statistics of mode partition noise in a nearly single-mode cw laser
TL;DR: In this paper, the probability density function of the mode partition noise of a nearly single-mode cw laser is discussed, where the drop out rate of each side mode obeys an exponential distribution.
References
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Journal ArticleDOI
Analysis of mode partition noise in laser transmission systems
TL;DR: In this paper, the authors derived a simple formula describing the mode partition noise, gave useful design relations, and verified the analysis by comparison with system experiments, and showed that the effect is in essence a pulse-delay fluctuation and cannot be reduced by increasing the received signal power.
Journal ArticleDOI
Noise properties of injection lasers due to reflected waves
Osamu Hirota,Yasuharu Suematsu +1 more
TL;DR: In this paper, the authors investigated the origin, qualitative, and quantitative properties of low frequency noise appearing in the light output of the laser diode, which is strongly coupled to optical fibers.
Journal ArticleDOI
Direct observation of Lorentzian lineshape of semiconductor laser and linewidth reduction with external grating feedback
S. Saito,Yoshihisa Yamamoto +1 more
TL;DR: In this paper, the Lorentzian lineshape of a single longitudinal mode AlGaAs semiconductor laser is directly observed by optical heterodyne detection and a remarkable reduction in the spectral linewidth to less than 50 kHz is achieved with external grating feedback.
Journal ArticleDOI
Laser Mode Partition Noise Evaluation for Optical Fiber Transmission
Y. Okano,K. Nakagawa,T. Ito +2 more
TL;DR: It is experimentally clarified that the intensity in each longitudinal mode of a laser diode fluctuates, although the intensity for the total mode is constant, and this fluctuation causes degradation of the error rates after transmission through a long optical fiber.
Journal ArticleDOI
Partition fluctuations in nearly single-longitudinal-mode lasers
Charles H. Henry,P. Henry,M. Lax +2 more
TL;DR: In this article, a simple model of mode partition noise is developed, which is valid for semiconductor lasers operating CW, having a single active region and oscillating primarily in one dominant mode.
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