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Influence of the Spectral Gain Suppression on the Intensities of Longitudinal Modes in 1.55 µm InGaAsP Lasers.

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Title: Influence of the Spectral Gain Suppression on the Intensities of Longitudinal Modes in 1.55 µm InGaAsP Lasers.
Authors: Ahmed, Moustafa F.1, Mahmoud, Safwat W. Z.1, Yamada, Minoru2
Source: Egyptian Journal of Solids. 2003, Vol. 26 Issue 2, p205-224. 20p. 1 Chart, 4 Graphs, 1 Map.
Subjects: Spectrum analysis, Lasers, Perturbation theory, Equations, Numerical analysis
Abstract: The self-suppression and both symmetric and asymmetric cross-suppressions of the gain of longitudinal modes have been analyzed in InGaAsP lasers emitting in wavelength of 1.55 µm based on a third-order perturbation approach. We compared the influences of such suppression effects of gain on the time variations of the mode intensities and the associated output spectra. Such study was based on numerical integration of the laser rate equations in a multi-mode model. Based on intensive simulations of mode dynamics, we explored the operating regions of the single- and multi-mode operations over a long scale of the strength of the asymmetric gain suppression. The results showed that the competition among the modes induces normal multimode operation under self suppression, single-mode operation in the central mode of the gain spectrum under symmetric cross-suppression, and single-mode operation with jumping of the lasing mode to the long-wavelength side of the spectrum under asymmetric gain suppression. When the asymmetric gain suppression is enhanced, transient multi-mode switching is stimulated showing asymmetric multi-mode output spectra in good correspondence with experimental results. [ABSTRACT FROM AUTHOR]
Copyright of Egyptian Journal of Solids is the property of Egyptian Society of Solid State Science & Applications and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Influence of the Spectral Gain Suppression on the Intensities of Longitudinal Modes in 1.55 µm InGaAsP Lasers.
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  Data: <searchLink fieldCode="AR" term="%22Ahmed%2C+Moustafa+F%2E%22">Ahmed, Moustafa F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mahmoud%2C+Safwat+W%2E+Z%2E%22">Mahmoud, Safwat W. Z.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yamada%2C+Minoru%22">Yamada, Minoru</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Egyptian+Journal+of+Solids%22">Egyptian Journal of Solids</searchLink>. 2003, Vol. 26 Issue 2, p205-224. 20p. 1 Chart, 4 Graphs, 1 Map.
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  Data: <searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Lasers%22">Lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Perturbation+theory%22">Perturbation theory</searchLink><br /><searchLink fieldCode="DE" term="%22Equations%22">Equations</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The self-suppression and both symmetric and asymmetric cross-suppressions of the gain of longitudinal modes have been analyzed in InGaAsP lasers emitting in wavelength of 1.55 µm based on a third-order perturbation approach. We compared the influences of such suppression effects of gain on the time variations of the mode intensities and the associated output spectra. Such study was based on numerical integration of the laser rate equations in a multi-mode model. Based on intensive simulations of mode dynamics, we explored the operating regions of the single- and multi-mode operations over a long scale of the strength of the asymmetric gain suppression. The results showed that the competition among the modes induces normal multimode operation under self suppression, single-mode operation in the central mode of the gain spectrum under symmetric cross-suppression, and single-mode operation with jumping of the lasing mode to the long-wavelength side of the spectrum under asymmetric gain suppression. When the asymmetric gain suppression is enhanced, transient multi-mode switching is stimulated showing asymmetric multi-mode output spectra in good correspondence with experimental results. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Egyptian Journal of Solids is the property of Egyptian Society of Solid State Science & Applications and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.21608/ejs.2003.150159
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      – Code: eng
        Text: English
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        PageCount: 20
        StartPage: 205
    Subjects:
      – SubjectFull: Spectrum analysis
        Type: general
      – SubjectFull: Lasers
        Type: general
      – SubjectFull: Perturbation theory
        Type: general
      – SubjectFull: Equations
        Type: general
      – SubjectFull: Numerical analysis
        Type: general
    Titles:
      – TitleFull: Influence of the Spectral Gain Suppression on the Intensities of Longitudinal Modes in 1.55 µm InGaAsP Lasers.
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            NameFull: Ahmed, Moustafa F.
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            NameFull: Mahmoud, Safwat W. Z.
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            NameFull: Yamada, Minoru
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            – D: 01
              M: 12
              Text: 2003
              Type: published
              Y: 2003
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              Value: 26
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            – TitleFull: Egyptian Journal of Solids
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