Real-time frequency dynamics and high-resolution spectra of a semiconductor laser with delayed feedback
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TLDR
This experiment provides insight into the overall spectral drift on nanosecond timescales, the spectral distribution of the unstable pulsations and the role of the individual external cavity modes in the delayed feedback semiconductor lasers.Abstract:
The unstable emission of semiconductor lasers due to delayed optical feedback is characterized by combined intensity and frequency dynamics. Nevertheless, real-time experimental investigations have so far been restricted to measurements of intensity dynamics only. Detailed analysis and comparison with numerical models, therefore, have suffered from limited experimental information. Here, we report the simultaneous determination of the lasers optical emission intensity and emission frequency with high temporal resolution. The frequency dynamics is made accessible using a heterodyne detection scheme, in which a beat signal between the delayed feedback laser and a reference laser is generated. Our experiment provides insight into the overall spectral drift on nanosecond timescales, the spectral distribution of the unstable pulsations and the role of the individual external cavity modes. This opens new perspectives for the analysis, understanding and functional utilization of delayed feedback semiconductor lasers.read more
Citations
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Complex photonics: Dynamics and applications of delay-coupled semiconductors lasers
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References
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External optical feedback effects on semiconductor injection laser properties
R. Lang,Kohroh Kobayashi +1 more
TL;DR: In this paper, the effects of external optical feedback on the semiconductor laser properties have been examined, i.e., return of a portion of the laser output from a reflector external to the laser cavity.
Journal ArticleDOI
Fast physical random bit generation with chaotic semiconductor lasers
Atsushi Uchida,Atsushi Uchida,Kazuya Amano,Masaki Inoue,Kunihito Hirano,Sunao Naito,Hiroyuki Someya,Isao Oowada,Takayuki Kurashige,Masaru Shiki,Shigeru Yoshimori,Kazuyuki Yoshimura,Peter Davis +12 more
TL;DR: It is shown that good quality random bit sequences can be generated at very fast bit rates using physical chaos in semiconductor lasers, which means that the performance of random number generators can be greatly improved by using chaotic laser devices as physical entropy sources.
Journal ArticleDOI
Communication with Chaotic Lasers
TL;DR: The experimental demonstration of chaotic communication with an optical system is described, using an erbium-doped fiber ring laser to produce chaotic light and embedded in the larger chaotic carrier and transmitted to a receiver system where the message was recovered from the chaos.
Experiments and Modeling
TL;DR: In this paper, primary physical experiments were used to carry out the second moment budgets to evaluate models and closure assumptions and seek improvements/modifications where models prove deficient, where the model overcompensates one physical phenomenon and undercompensate another so that the net result is a good agreement between the two.
Journal ArticleDOI
Fast Pulsing and Chaotic Itinerancy with a Drift in the Coherence Collapse of Semiconductor Lasers
Ingo Fischer,G.H.M. van Tartwijk,Alfred M. Levine,Wolfgang Elsässer,Ernst O. Göbel,Daan Lenstra +5 more
TL;DR: The first experimental observation of irregular picosecond light pulses within the coherence collapse of a semiconductor laser subject to delayed moderate optical feedback is reported.
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