Facet phases and sub-threshold spectra of DFB lasers: spectral extraction, features, explanations and verification

Morrison, Gordon; Cassidy, Daniel T.; Bruce, D.M.

doi:10.1109/3.922773

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…Although there have been many researches and investigations on DFB lasers, their optimization and characteristics investigation are on-going research subjects of recent years [40][41][42][43][44][45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Analysis and modeling of ridge waveguide quarterly wavelength shifted distributed feedback laser with three rate equations

Ghadimi

Shal

2015

Front. Optoelectron.

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In this paper, ridge waveguide quarterly wavelength shifted distributed feedback (RW-QWS-DFB) laser was modeled and analyzed. In this behavioral model, some characteristics of the device, such as threshold current, line width, power of output wave, spectrum of output wave, and laser stability in high powers, were investigated in accordance with different physical and geographical parameters such as sizes and structures of the layers. Considering a new proposed algorithm, the analysis of the mentioned structures was performed using transfer matrix method (TMM), the solution of coupled waves and carrier rate equations. The results showed the advantages of some parameters in this structure.

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Section: Introductionmentioning

confidence: 99%

Analysis and modeling of ridge waveguide quarterly wavelength shifted distributed feedback laser with three rate equations

Ghadimi

Shal

2015

Front. Optoelectron.

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“…Since the first basic description of distributed feedback lasers by Kogelnick and Shank, 1 many authors have presented methods for modeling distributed laser structures. [2][3][4][5] In recent years, asymmetric structures such as those with partial gratings or quarter wave shifts have been used. These variations on conventional distributed feedback devices have many potential advantages such as higher single mode yield, lower threshold and higher slope efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] There have been some effective techniques for DOA estimation of multiple targets as subspace-based algorithms 4-6 including multiple signal classification (MUSIC) and estimation of signal parameter via rotational invariance (ESPRIT) techniques. However, when only a single measurement vector (i.e., array signal vector) is used for DOA estimation of multiple targets, it is not easy to determine the true DOAs using conventional subspace-based algorithms, owing to the poor statistical property.…”

Section: Introductionmentioning

confidence: 99%

“…The randomly varying back‐facet phase in conjunction with these parameters determines the single mode yield, slope efficiency, and wavelength. Since the first basic description of distributed feedback lasers by Kogelnick and Shank, many authors have presented methods for modeling distributed laser structures . In recent years, asymmetric structures such as those with partial gratings or quarter wave shifts have been used.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of yield, slope efficiency, and spectra of multisegment distributed feedback lasers

Hong

Khinda

Jules

et al. 2017

Micro & Optical Tech Letters

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The properties and yield of a distributed feedback laser depends on the values of coupling coefficient j and many other parameters. Multisegmented distributed feedback devices (consisting of grated and ungrated areas, quarterwave-shifts, and potentially other features other) are becoming more common and have advantages over uniform grated devices. A multi-segmented transfer matrix model is used to model the spectra, yield, and slope efficiency of multisegment and uniform distributed feedback lasers. The results give an excellent match to measured spectra of partially grated, quarter-wave-shifted, and uniform devices, and qualitatively agree with experimental data on the distribution of slope efficiency in devices. A study on partial grated devices suggested they may have advantages in single mode yield compared to uniformly grated devices. This method (and the specific software tool Glaparex) can be used to control device parameters in manufacturing and to optimize laser designs design.distributed feedback devices, semiconductor device modeling, semiconductor lasers | I NT RODU CTI ONDistributed feedback laser parameters, such as index and gain coupling coefficients, j, play a critical role in determining the performance characteristics such as threshold current and slope efficiency. The randomly varying back-facet phase in conjunction with these parameters determines the single mode yield, slope efficiency, and wavelength. Since the first basic description of distributed feedback lasers by Kogelnick and Shank, 1 many authors have presented methods for modeling distributed laser structures. [2][3][4][5] In recent years, asymmetric structures such as those with partial gratings or quarter wave shifts have been used. These variations on conventional distributed feedback devices have many potential advantages such as higher single mode yield, lower threshold and higher slope efficiency. 6-10Distributed feedback lasers have been extensively modeled. However, relatively little work has been on modeling of multisegment devices, including both ungrated regions and quarter-wave shifts with grated regions. In this article, we model some of these asymmetric structures using our publicly available software tool, GLaparex.11 The basic fit of several different sorts of conventional uniform and multisegment distributed feedback lasers is modeled and demonstrated to be consistent by comparison to experimental results. Then, yield and slope efficiency of some sample designs are explored. This extension to conventional models allows variations on a design to be investigated to maximize total yield, including DC characteristics and side mode suppression ratio.In this article, we also describe our publicly available software tool, Glaparex, with which our analysis has been done. This tool has a graphical user interface, supports multisegment structures and facilitates high quality and rapid analysis. | M ODE L P ARA MET ERSThe technique used to calculate the spectra builds on the transfer matrix calculation of the basic sp...

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“…Direction-of-arrival (DOA) estimation has become one of the important topics in the array signal processing field for radar, sonar, and so forth. [1][2][3] There have been some effective techniques for DOA estimation of multiple targets as subspace-based algorithms [4][5][6] including multiple signal classification (MUSIC) and estimation of signal parameter via rotational invariance (ESPRIT) techniques. However, when only a single measurement vector (i.e., array signal vector) is used for DOA estimation of multiple targets, it is not easy to determine the true DOAs using conventional subspace-based algorithms, owing to the poor statistical property.…”

Section: Introductionmentioning

confidence: 99%

An approach for improving the transition-band characteristic of a stepped-impedance low-pass filter

Jiang¹,

Wang²

2012

2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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The properties and yield of a distributed feedback laser depends on the values of coupling coefficient j and many other parameters. Multisegmented distributed feedback devices (consisting of grated and ungrated areas, quarterwave-shifts, and potentially other features other) are becoming more common and have advantages over uniform grated devices. A multi-segmented transfer matrix model is used to model the spectra, yield, and slope efficiency of multisegment and uniform distributed feedback lasers. The results give an excellent match to measured spectra of partially grated, quarter-wave-shifted, and uniform devices, and qualitatively agree with experimental data on the distribution of slope efficiency in devices. A study on partial grated devices suggested they may have advantages in single mode yield compared to uniformly grated devices. This method (and the specific software tool Glaparex) can be used to control device parameters in manufacturing and to optimize laser designs design.distributed feedback devices, semiconductor device modeling, semiconductor lasers | I NT RODU CTI ONDistributed feedback laser parameters, such as index and gain coupling coefficients, j, play a critical role in determining the performance characteristics such as threshold current and slope efficiency. The randomly varying back-facet phase in conjunction with these parameters determines the single mode yield, slope efficiency, and wavelength. Since the first basic description of distributed feedback lasers by Kogelnick and Shank, 1 many authors have presented methods for modeling distributed laser structures. [2][3][4][5] In recent years, asymmetric structures such as those with partial gratings or quarter wave shifts have been used. These variations on conventional distributed feedback devices have many potential advantages such as higher single mode yield, lower threshold and higher slope efficiency. [6][7][8][9][10] Distributed feedback lasers have been extensively modeled. However, relatively little work has been on modeling of multisegment devices, including both ungrated regions and quarter-wave shifts with grated regions. In this article, we model some of these asymmetric structures using our publicly available software tool, GLaparex. 11 The basic fit of several different sorts of conventional uniform and multisegment distributed feedback lasers is modeled and demonstrated to be consistent by comparison to experimental results. Then, yield and slope efficiency of some sample designs are explored. This extension to conventional models allows variations on a design to be investigated to maximize total yield, including DC characteristics and side mode suppression ratio.In this article, we also describe our publicly available software tool, Glaparex, with which our analysis has been done. This tool has a graphical user interface, supports multisegment structures and facilitates high quality and rapid analysis. | M ODE L P ARA MET ERSThe technique used to calculate the spectra builds on the transfer matrix calculation of the bas...

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Facet phases and sub-threshold spectra of DFB lasers: spectral extraction, features, explanations and verification

Cited by 14 publications

References 14 publications

Analysis and modeling of ridge waveguide quarterly wavelength shifted distributed feedback laser with three rate equations

Analysis and modeling of ridge waveguide quarterly wavelength shifted distributed feedback laser with three rate equations

Modeling of yield, slope efficiency, and spectra of multisegment distributed feedback lasers

An approach for improving the transition-band characteristic of a stepped-impedance low-pass filter

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