Optical-feedback-induced chaos and its control in multimode semiconductor lasers

Ryan, Andrew T.; Agrawal, Govind P.; Gray, George R.; Gage, Edward C.

doi:10.1109/3.286153

Cited by 137 publications

(77 citation statements)

References 23 publications

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“…In the regime of strong OFB, laser noise exceeds the quantum limit and its level depends on whether the laser operates in CW or emits uniform/non-uniform oscillations [19]. Study of laser noise under both OFB and intensity modulation has been studied by several groups specially for controlling OFB-noise by modulating the laser in the vicinity of the relaxation oscillations [20]− [22]. However, studying the noise problem at modulation frequencies much higher than the relaxation frequency, such as the case of ultra-high frequency passband, has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Intensity noise in ultra-high frequency modulated semiconductor laser with strong feedback and its influence on noise figure of RoF links

Ahmed

Bakry

Al-Tuwirqi

et al. 2013

J. Eur. Opt. Soc.-Rapid Publ.

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We characterize the intensity noise associated with the ultra-high frequency direct modulation of semiconductor lasers under strong optical feedback over a millimeter-wave frequency passband between 54.5 and 56.5 GHz. Enhancement of the modulation response over this millimeter wave band due to optical feedback is clearly shown by time-delay rate equation analysis fully involving the strong optical feedback effect. The contribution of the relative intensity noise of the laser to the noise figure of an ultra-high speed radio over fiber link is evaluated. We show that subjecting the laser diode to strong feedback improves the noise figure of a 55.8-GHz radio over fiber link nearly by 20 dB in the regime of small-signal modulation and 10 dB under large-signal modulation.

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Section: Introductionmentioning

confidence: 99%

Intensity noise in ultra-high frequency modulated semiconductor laser with strong feedback and its influence on noise figure of RoF links

Ahmed

Bakry

Al-Tuwirqi

et al. 2013

J. Eur. Opt. Soc.-Rapid Publ.

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“…4. When the OFB reaches , operation of the laser becomes more complicated, and could be called chaotic operation [33]- [38]. Fig.…”

Section: A Variation Of the Laser Operation With Ofbmentioning

confidence: 99%

An improved analysis of semiconductor laser dynamics under strong optical feedback

Abdulrhmann

Ahmed

Okamoto³

et al. 2003

IEEE J. Select. Topics Quantum Electron.

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Abstract-We present an improved theoretical model to analyze dynamics and operation of semiconductor lasers under optical feedback (OFB). The model is applicable for arbitrary strength of OFB ranging from weak to very strong. The model has been applied to investigate the dynamics and operation of lasers over wide ranges of OFB and injection current. An improved set of modified rate equations of lasers operating under OFB were proposed. We introduced a theoretical model to determine the power emitted from both the laser back facet and external reflector. The results showed that the operation of semiconductor lasers is classified into continuous wave, chaotic, and pulsing operations, depending on the operating conditions. The light versus current characteristics were examined in the operating regions of the classified operations. Under strong OFB, we predicted for the first time pulsing operation of lasers at injection currents well above the threshold. We observed the pulsing operation in experiments in good correspondence with the simulated results.

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“…Regardless, open-loop perturbations have been used successfully to entrain the dynamics of low-dimensional laser systems [41]- [43], usually by modulating a system parameter at a frequency that is present in the free-running system such as the relaxation oscillation frequency, for example. Nonfeedback perturbations have also been shown to entrain periodic behavior in some semiconductor laser systems [44]- [47]. Furthermore, from the standpoint of optical engineering, the high-frequency injection technique is a well-known tool for reducing the relative intensity noise in ECSL's [48], [49].…”

Section: Introductionmentioning

confidence: 99%

Entraining power-dropout events in an external-cavity semiconductor laser using weak modulation of the injection current

Sukow

Gauthier

2000

IEEE J. Quantum Electron.

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Abstract-We measure experimentally the effects of injection current modulation on the statistical distribution of time intervals between power-dropout events occuring in an external-cavity semiconductor laser operating in the low-frequency fluctuation regime. These statistical distributions are sensitive indicators of the presence of pump current modulation. Under most circumstances, we find that weak low-frequency (in the vicinity of 19 MHz) modulation of the current causes the dropouts to occur preferentially at intervals that are integral multiples of the modulation period. The dropout events can be entrained by the periodic perturbations when the modulation amplitude is large (peak-to-peak amplitude 8% of the dc injection current). We conjecture that modulation induces a dropout when the modulation frequency is equal to the difference in frequency between a mode of the extended cavity laser and its adjacent antimode. We also find that the statistical distribution of the dropout events is unaffected by the periodic perturbations when the modulation frequency is equal to the free spectral range of the external cavity. Numerical simulations of the extended-cavity laser display qualitatively similar behavior. The relationship of these phenomena to stochastic resonance is discussed and a possible use of the modulated laser dynamics for chaos communication is described.

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Optical-feedback-induced chaos and its control in multimode semiconductor lasers

Cited by 137 publications

References 23 publications

Intensity noise in ultra-high frequency modulated semiconductor laser with strong feedback and its influence on noise figure of RoF links

Intensity noise in ultra-high frequency modulated semiconductor laser with strong feedback and its influence on noise figure of RoF links

An improved analysis of semiconductor laser dynamics under strong optical feedback

Entraining power-dropout events in an external-cavity semiconductor laser using weak modulation of the injection current

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