Nonlinear dynamics investigation in few-cycle laser seeding of quantum cascade lasers: role of permanent dipole moment

Wu, Erheng; Cao, Qing; You, Jing; Liu, Chengpu

doi:10.1016/j.optcom.2017.01.055

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…The emission from such seeded lasers has been simulated in refs. 21 , 22 , both immediately following pulse injection and in the steady state. These studies have found the laser emission to be largely insensitive to changes in the pulse spectrum and pulse amplitude 21 .…”

Section: Resultsmentioning

confidence: 99%

Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers

Kundu

Wang

et al. 2018

Nat Commun

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Single-mode frequency-tuneable semiconductor lasers based on monolithic integration of multiple cavity sections are important components, widely used in optical communications, photonic integrated circuits and other optical technologies. To date, investigations of the ultrafast switching processes in such lasers, essential to reduce frequency cross-talk, have been restricted to the observation of intensity switching over nanosecond-timescales. Here, we report coherent measurements of the ultrafast switch-on dynamics, mode competition and frequency selection in a monolithic frequency-tuneable laser using coherent time-domain sampling of the laser emission. This approach allows us to observe hopping between lasing modes on picosecond-timescales and the temporal evolution of transient multi-mode emission into steady-state single mode emission. The underlying physics is explained through a full multi-mode, temperature-dependent carrier and photon transport model. Our results show that the fundamental limit on the timescales of frequency-switching between competing modes varies with the underlying Vernier alignment of the laser cavity.

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Section: Resultsmentioning

confidence: 99%

Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers

Kundu

Wang

et al. 2018

Nat Commun

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“…The nonlinear optical effect has important application value in the fields of optical communication, optical storage, and optical processing. [10][11][12][13][14] In recent years, researchers have conducted extensive research on the optical absorption characteristics of QDs, aiming to understand their potential application value in different applications. [15][16][17][18][19] W.F.…”

Section: Introductionmentioning

confidence: 99%

“…The nonlinear optical effect has important application value in the fields of optical communication, optical storage, and optical processing. [ 10–14 ]…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Wang

2023

Physica Status Solidi (b)

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The nonlinear optical properties of quantum dots under multidimensional confinement potential are investigated. In the framework of the effective mass approximation, the analytical formula of the optical absorption coefficient in the quantum dots is derived using the density matrix method and the iterative procedure, and the numerical results of typical Al0.3Ga0.7 As/GaAs material are calculated. Through calculation and numerical fitting, it is found that increasing temperature and the depth of limiting potential will give rise to the absorption peak to move to the high‐energy region commonly referred to as the blueshift, within a certain range of parameter variations. While reducing the range of limiting potential, quantum dot radius and the hydrostatic pressure can achieve the same effect. It is important to emphasize that variations in hydrostatic pressure and the depth of the limiting potential result in significant changes to the peak value of the optical absorption coefficient. The research results have a certain guiding significance for further study of the optical properties of quantum dots under multidimensional confinement potential and their application in practical production.

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Computational methods and techniques for nonlinear optics

Fang,

Du,

Liu

et al. 2024

Fundamentals and Applications of Nonlinear Nanophotonics

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Nonlinear dynamics investigation in few-cycle laser seeding of quantum cascade lasers: role of permanent dipole moment

Cited by 3 publications

References 25 publications

Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers

Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers

Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters

Computational methods and techniques for nonlinear optics

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Nonlinear dynamics investigation in few-cycle laser seeding of quantum cascade lasers: role of permanent dipole moment

Cited by 3 publications

References 25 publications

Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers

Ultrafast switch-on dynamics of frequency-tuneable semiconductor lasers

Nonlinear Optical Properties of Al0.3Ga0.7As/GaAs Quantum Dots under Tunable Parameters

Computational methods and techniques for nonlinear optics

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Product

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Nonlinear Optical Properties of Al_0.3Ga_0.7As/GaAs Quantum Dots under Tunable Parameters