Journal ArticleDOI
Theory of the phase noise and power spectrum of a single mode injection laser
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TLDR
In this paper, it was shown that the additional phase changes also give rise to line shape structure in the form of additional peaks separated from the main peak by multiples of the relaxation oscillation frequency.Abstract:
Spontaneous emission alters the phase and amplitude of the laser field. The amplitude changes induce relaxation oscillations, which cause additional phase changes while restoring the field amplitude to the steady state value. It was previously shown that the additional phase changes greatly enhance the linewidth. We show here that the additional phase changes also give rise to line shape structure in the form of additional peaks separated from the main peak by multiples of the relaxation oscillation frequency. The calculated mean square phase change and power spectrum are in good agreement with published observations.read more
Citations
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PatentDOI
Quantum cascade laser
TL;DR: In this paper, the authors proposed a quantum cascade laser consisting of a gain region (14) consisting of several layers (20) each including: alternating strata of a first type (28) defining each AllnAs quantum barrier and strata with injection barriers interposed between two of the layers.
Journal ArticleDOI
Coherent detection in optical fiber systems
TL;DR: This work reviews detection methods, including noncoherent, differentially coherent, and coherent detection, as well as a hybrid method, and compares modulation methods encoding information in various degrees of freedom (DOF).
Journal ArticleDOI
Linewidth broadening factor in semiconductor lasers--An overview
Marek Osinski,J. Buus +1 more
TL;DR: In this article, the authors present an overview of topics related to one of the fundamental parameters for semiconductor lasers-the linewidth broadening factor α that describes the coupling between carrier-concentration-induced variations of real and imaginary parts of susceptibility.
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Coherence collapse in single-mode semiconductor lasers due to optical feedback
TL;DR: In this article, a line broadening up to 25 GHz in a singlemode semiconductor laser with relatively strong optical feedback is reported and theoretically analyzed, based on the view that coherence collapse is maintained due to optical-feedback-delay effects, in which quantum fluctuations play no role of importance.
Journal ArticleDOI
Theory of spontaneous emission noise in open resonators and its application to lasers and optical amplifiers
TL;DR: In this paper, a theory of spontaneous emission noise is presented based on classical electromagnetic theory for open resonators, where a local Langevin force is added to the wave equation to account for spontaneous emission.
References
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Journal ArticleDOI
Theory of the linewidth of semiconductor lasers
TL;DR: In this article, a theory of the spectral width of a single-mode semiconductor laser is presented and used to explain the recent measurements of Fleming and Mooradian on AlGaAs lasers.
Journal ArticleDOI
Classical Noise. V. Noise in Self-Sustained Oscillators
TL;DR: In this paper, it was shown that the phase of a rotating-wave van der Pol oscillator can be modeled as a Gaussian variable subject to the expected Brownian-motion diffusion.
Journal ArticleDOI
Fundamental line broadening of single-mode (GaAl)As diode lasers
Mark W. Fleming,Aram Mooradian +1 more
TL;DR: The spectral width of GaAlAs single-mode diode lasers varied linearly with reciprocal output power at 300 K with a slope 50 times greater than that predicted by the SchawlowTownes expression without partial inversion.