A novel model of semiconductor laser operation under strong optical feedback

Abdulrhmann, Salah; Ahmed, Moustafa; Okamoto, T.; Yamada, Minoru

doi:10.1109/islc.2002.1041138

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Owing to the very low‐reflection coefficient (∼10 −4 ) of the AR‐coated facet, the laser operates with an external fiber cavity of strong optical feedback (OFB) at the lasing wavelength 2, 3. This strong OFB happens to cause disturbance in the laser operation, resulting in unstable output 4–8. Recent investigations of the operation characteristics of FGSLs have indicated that they operate in continuous wave (CW), pulsation (periodic or quasi‐periodic), and chaos depending on the lasing conditions and the system configuration 8–10.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of the output and operations of semiconductor lasers subject to strong optical feedback and its dependence on the linewidth‐enhancement factor

Abdulrhmann

Yamada

Ahmed

2011

Int J Numerical Modelling

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SUMMARYInfluence of the linewidth-enhancement factor on the output and operations of InGaAs/InP pumping lasers emitting at a wavelength of 980 nm under strong optical feedback is investigated numerically. The investigations are performed based on intensive numerical integration of an improved time-delay rate equations of semiconductor lasers over wide ranges of the linewidth-enhancement factor and optical feedback strength. The results show that the semiconductor laser operates under strong optical feedback in continuous wave and pulsation at small values of the linewidth-enhancement factor. Under large values of the linewidth-enhancement factor, the laser happens to exhibit chaos and pulsation. We predict that semiconductor laser subjected to strong optical feedback exhibits much more stable pulsing operation under higher values of the linewidth-enhancement factor, which indicates that the laser is locked at the external cavity frequency.

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Section: Introductionmentioning

confidence: 99%

Numerical modeling of the output and operations of semiconductor lasers subject to strong optical feedback and its dependence on the linewidth‐enhancement factor

Abdulrhmann

Yamada

Ahmed

2011

Int J Numerical Modelling

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“…The pumping lasers are designed with a low front-facet reflectivity compared with that of the gratings and are then subjected to strong optical feedback (OFB), which changes the laser operation dramatically [1][2][3][4][5]. Moreover, the laser operation is influenced by intrinsic fluctuations in the intensity and optical phase of the lasing field due to transition of electrons between the conduction and valence bands [6], which may modulate the influence of the OFB on the laser dynamics. The strong region of OFB can not be analyzed by the model of Lang and Kobayashi [7] which is suitable for weak and moderate OFB.…”

Section: Introductionmentioning

confidence: 99%

Optimum conditions for operating pumping laser subject to strong optical feedback

Abdulrhmann

2009

2009 IFIP International Conference on Wireless and Optical Communications Networks

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This paper investigates the effect of the Iinewidth enhancement factor on the operation and intensity noise fluctuations of 980-InGaAslInP fiber grating lasers operating under strong optical feedback. The analyses are performed in terms of the temporal trajectory of the laser intensity, bifurcation diagram and relative intensity noise. The influence of intrinsic fluctuations in the intensity and optical phase of the lasing field on the laser dynamics were taken into account. The laser diode operates in pulsation under strong optical feedback and at small and relatively large values the Iinewidth enhancement factor. The optical feedback noise is found to be as low as the quantum noise level when the laser is operated in pulsing region and at relatively large values of the Iinewidth enhancement factor.

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Theoretical analysis of the operating state of semiconductor lasers subject to strong optical feedback

Abdulrhmann

Yamada

Proceedings IEEE/WIC International Conference on Web Intelligence (WI 2003)

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A novel model of semiconductor laser operation under strong optical feedback

Cited by 4 publications

References 2 publications

Numerical modeling of the output and operations of semiconductor lasers subject to strong optical feedback and its dependence on the linewidth‐enhancement factor

Numerical modeling of the output and operations of semiconductor lasers subject to strong optical feedback and its dependence on the linewidth‐enhancement factor

Optimum conditions for operating pumping laser subject to strong optical feedback

Theoretical analysis of the operating state of semiconductor lasers subject to strong optical feedback

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