Transient behaviors of current-injection quantum-dot microdisk lasers

Mao, Ming-Hua; Chien, Hsiung–Fei

doi:10.1364/oe.20.003302

Cited by 14 publications

(9 citation statements)

References 18 publications

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“…High-speed directly modulated microlasers are potential light sources for photonic integrated circuits and on-chip optical interconnection with the merit of small footprints and low power consumptions. Compared to the microlasers of vertical cavity surfaceemitting lasers and photonic crystal microlasers [2][3][4], the reported 3dB bandwidths are much smaller for microdisk lasers with whispering-gallery modes (WGMs) [5][6][7]. Modulation bandwidth will be limited for microcavity lasers with a large mode Q factor, i.e., a large mode lifetime [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation on high speed directly modulated microcircular lasers

Huang

Zou

et al. 2014

SPIE Proceedings

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High speed modulation characteristics are investigated for microcircular lasers connected with an output waveguide theoretically and experimentally. The injection current profile and carrier spatial hole-burning and diffusion are accounted in the rate equation model by radially dividing the microcircular resonator into two regions under the approximation of uniform carrier densities. The numerical results indicate that wide mode field pattern in radial direction has merit for high speed modulation, which is expected for coupled modes in circular microlasers connected with an output waveguide. Small signal response curves and large signal modulation responses are investigated for a 15-μm-radius microlaser connected with a 2 μm wide output waveguide. The highest resonance frequencies of 7.2, 5.9 and 3.9 GHz are obtained at the temperatures of 287, 298 and 312 K from the small signal response curves, and clear eye diagrams at 12.5Gbit/s with an extinction ratio of 6.1 dB are observed for the microlaser at biasing current of 38 mA and the temperature of 287 K.

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Section: Introductionmentioning

confidence: 99%

Investigation on high speed directly modulated microcircular lasers

Huang

Zou

et al. 2014

SPIE Proceedings

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“…7 High speed modulation characteristics were also studied for microdisk lasers with whispering-gallery modes (WGMs). [8][9][10] Very recently, small-signal modulation response with a resonance frequency of 12.5 GHz was realized for a directional emission microdisk laser by optimizing mode Q factor, 11,12 a 3 dB bandwidth of 10.8 GHz was obtained for a microring laser, 13 and the microspiral lasers with spatially selected injection was demonstrated. 14 Mode field patterns of the WGMs are mainly localized in the rim of the microdisk resonators, which will result in strong carrier spatial hole-burning and carrier diffusion effect and influence the dynamic characteristics greatly.…”

mentioning

confidence: 99%

Influences of carrier diffusion and radial mode field pattern on high speed characteristics for microring lasers

Huang

Yang

et al. 2014

Applied Physics Letters

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High-speed directly modulated microlasers are potential light sources for on-chip optical interconnection and photonic integrated circuits. In this Letter, dynamic characteristics are studied for microring lasers by rate equation analysis considering radial carrier hole burning and diffusion and experimentally. The coupled modes with a wide radial field pattern and the injection current focused in the edge area of microring resonator can greatly improve the high speed response curve due to the less carrier hole burning. The small-signal response curves of a microring laser connected with an output waveguide exhibit a larger 3 dB bandwidth and smaller roll-off at low frequency than that of the microdisk laser with the same radius of 15 μm, which accords with the simulation results.

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“…19 To understand in deep the laser emission and for an accurate treatment of the rate equation formalism in microcavity lasers, it is necessary to determine the PF. 10,20 The correct and unambiguous determination of the PF may also provide insights in the determination of the laser threshold. 21 In this work we have measured the dependence of the decay time on the excitation power in lasing and non-lasing optical modes of PCMs with QWRs by time resolved measurements.…”

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confidence: 99%

“…The other parameters of the model were fixed as in Ref. 20 provided that the material, the type of cavity, and the fabrication process are the same. Only the cavity photon lifetime and the nonradiative recombination rate have been considered to take a different value.…”

mentioning

confidence: 99%

Excitation power dependence of the Purcell effect in photonic crystal microcavity lasers with quantum wires

Canet‐Ferrer

Prieto

Muñoz‐Matutano

et al. 2013

Applied Physics Letters

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The Purcell effect dependence on the excitation power is studied in photonic crystal microcavity lasers embedding InAs/InP quantum wires. In the case of non-lasing modes, the Purcell effect has low dependence on the optical pumping, attributable to an exciton dynamics combining free and localized excitons. In the case of lasing modes, the influence of the stimulated emission makes ambiguous the determination of the Purcell factor. We have found that this ambiguity can be avoided by measuring the dependence of the decay time on the excitation power. These results provide insights in the determination of the Purcell factor in microcavity lasers. V C 2013 AIP Publishing LLC.

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Transient behaviors of current-injection quantum-dot microdisk lasers

Cited by 14 publications

References 18 publications

Investigation on high speed directly modulated microcircular lasers

Investigation on high speed directly modulated microcircular lasers

Influences of carrier diffusion and radial mode field pattern on high speed characteristics for microring lasers

Excitation power dependence of the Purcell effect in photonic crystal microcavity lasers with quantum wires

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