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Design Optimization of Passively Mode-Locked Semiconductor Lasers With Intracavity Grating Spectral Filters.

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Title: Design Optimization of Passively Mode-Locked Semiconductor Lasers With Intracavity Grating Spectral Filters.
Authors: O'Callaghan, Finbarr1, Bitauld, David1, O'Brien, Stephen1
Source: IEEE Journal of Quantum Electronics. Nov2014, Vol. 50 Issue 11, p863-873. 11p.
Subjects: Mode-locked lasers, Semiconductor lasers, Mathematical optimization, Light filters, Wavelengths, Carrier density, Absorption
Abstract: We consider design optimization of passively mode-locked two-section semiconductor lasers that incorporate intracavity grating spectral filters. Our goal is to develop a method for finding the optimal wavelength location for the filter in order to maximize the region of stable mode-locking as a function of drive current and reverse bias in the absorber section. In order to account for material dispersion in the two sections of the laser, we use analytic approximations for the gain and absorption as a function of carrier density and frequency. Fits to measured gain and absorption curves then provide inputs for numerical simulations based on a large signal accurate delay-differential model of the mode-locked laser. We show how a unique set of model parameters for each value of the drive current and reverse bias voltage can be selected based on the variation of the net gain along branches of steady-state solutions of the model. We demonstrate the validity of this approach by demonstrating qualitative agreement between the numerical simulations and measured current-voltage phase space of a two-section Fabry-Perot laser. We then show how to adapt this method to determine an optimum location for the spectral filter in a notional device with the same material composition, based on the targeted locking range, and accounting for the modal selectivity of the filter. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Journal of Quantum Electronics is the property of IEEE 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
An: 101187852
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  Data: Design Optimization of Passively Mode-Locked Semiconductor Lasers With Intracavity Grating Spectral Filters.
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Journal+of+Quantum+Electronics%22">IEEE Journal of Quantum Electronics</searchLink>. Nov2014, Vol. 50 Issue 11, p863-873. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Mode-locked+lasers%22">Mode-locked lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Semiconductor+lasers%22">Semiconductor lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+optimization%22">Mathematical optimization</searchLink><br /><searchLink fieldCode="DE" term="%22Light+filters%22">Light filters</searchLink><br /><searchLink fieldCode="DE" term="%22Wavelengths%22">Wavelengths</searchLink><br /><searchLink fieldCode="DE" term="%22Carrier+density%22">Carrier density</searchLink><br /><searchLink fieldCode="DE" term="%22Absorption%22">Absorption</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We consider design optimization of passively mode-locked two-section semiconductor lasers that incorporate intracavity grating spectral filters. Our goal is to develop a method for finding the optimal wavelength location for the filter in order to maximize the region of stable mode-locking as a function of drive current and reverse bias in the absorber section. In order to account for material dispersion in the two sections of the laser, we use analytic approximations for the gain and absorption as a function of carrier density and frequency. Fits to measured gain and absorption curves then provide inputs for numerical simulations based on a large signal accurate delay-differential model of the mode-locked laser. We show how a unique set of model parameters for each value of the drive current and reverse bias voltage can be selected based on the variation of the net gain along branches of steady-state solutions of the model. We demonstrate the validity of this approach by demonstrating qualitative agreement between the numerical simulations and measured current-voltage phase space of a two-section Fabry-Perot laser. We then show how to adapt this method to determine an optimum location for the spectral filter in a notional device with the same material composition, based on the targeted locking range, and accounting for the modal selectivity of the filter. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of IEEE Journal of Quantum Electronics is the property of IEEE 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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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1109/JQE.2014.2354691
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 863
    Subjects:
      – SubjectFull: Mode-locked lasers
        Type: general
      – SubjectFull: Semiconductor lasers
        Type: general
      – SubjectFull: Mathematical optimization
        Type: general
      – SubjectFull: Light filters
        Type: general
      – SubjectFull: Wavelengths
        Type: general
      – SubjectFull: Carrier density
        Type: general
      – SubjectFull: Absorption
        Type: general
    Titles:
      – TitleFull: Design Optimization of Passively Mode-Locked Semiconductor Lasers With Intracavity Grating Spectral Filters.
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            NameFull: O'Callaghan, Finbarr
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            NameFull: Bitauld, David
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            NameFull: O'Brien, Stephen
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            – D: 01
              M: 11
              Text: Nov2014
              Type: published
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