Wavelength switching performance of single- and dual-contact two-mode semiconductor lasers with current modulation

Brandonisio, Nicola; Heinricht, Patrycja; Osborne, S.; Amann, Andreas; O’Brien, Stephen

doi:10.1088/2040-8978/13/12/125501

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…In a model with separate GS and ES carrier populations, it can only be reproduced, if an asymmetry in the electron and hole dynamics is included [12]. Simpler two-mode laser models, which take into account only one charge-carrier type, have to include nonlinear gain terms with self-and cross-compression contributions to reproduce a similar qualitative shape of the input-output curve [33]. Such an approach, however, fails to describe the asynchronous refractive index dynamic of QD lasers [34], which requires multiple carrier types to be modeled.…”

Section: Model and Equationsmentioning

confidence: 99%

Stability of Optically Injected Two‐State Quantum‐Dot Lasers

et al. 2017

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Simultaneous two-state lasing is a unique property of semiconductor quantum-dot (QD) lasers. This not only changes steady-state characteristics of the laser device but also its dynamic response to perturbations. In this paper we investigate the dynamic stability of QD lasers in an external optical injection setup. Compared to conventional single-state laser devices, we find a strong suppression of dynamical instabilities in two-state lasers. Furthermore, depending on the frequency and intensity of the injected light, pronounced areas of bistability between both lasing frequencies appear, which can be employed for fast optical switching in all-optical photonic computing applications. These results emphasize the suitability of QD semiconductor lasers in future integrated optoelectronic systems where a high level of stability is required.

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Section: Model and Equationsmentioning

confidence: 99%

Stability of Optically Injected Two‐State Quantum‐Dot Lasers

et al. 2017

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“…Optical switching and bistability have attracted much attention due to their wide application prospects in optical memory, optical logic-gate, optical information processing, and so on [1][2][3][4][5][6][7]. Previous studies have demonstrated that semiconductor lasers (SLs) can exhibit diverse switching and bistability behaviors under different external pertur-bations [8][9][10][11][12][13][14][15]. For instance, BRANDONISIO et al have exhibited the mode switching based on a two-mode SL under current modulation, and found that the switching time could be less than 2 ns under appropriate modulation parameters [8].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have demonstrated that semiconductor lasers (SLs) can exhibit diverse switching and bistability behaviors under different external pertur-bations [8][9][10][11][12][13][14][15]. For instance, BRANDONISIO et al have exhibited the mode switching based on a two-mode SL under current modulation, and found that the switching time could be less than 2 ns under appropriate modulation parameters [8]. LI et al have discovered the recurrent switching phenomenon between two modes of semiconductor ring laser under counter-directional mutual feedback [9].…”

Section: Introductionmentioning

confidence: 99%

Power-induced lasing state switching and bistability in a two-state quantum dot laser subject to optical injection

Jiang

Jayaprasath

et al. 2020

Optica Applicata

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We theoretically investigate power-induced lasing state switching and bistability in a two-state quantum dot laser subject to optical injection. The simulated results show that, for a free-running two-state quantum dot laser operating at the ground state under low current, a power-induced lasing state switching between the ground state and the excited state can be achieved through introducing optical injection with a frequency (winj) close to the lasing frequency of excited state (wES). The injection power required for the state switching depends on the scanning route of injection power, i.e. there may exist state bistability for the injection power within a certain region. For forward scanning injection power, with the increase of frequency detuning (ΔΩ = winj – wES), the injection power required for the state switching shows a decreasing trend accompanied by slight fluctuations. However, for backward scanning injection power, the injection power required for the state switching exhibits obvious fluctuations with the increase of ΔΩ. The width of the hysteresis loop fluctuates with ΔΩ, and the fluctuation amplitude is increased with the increase of the injection current. Additionally, the influences of the inhomogeneous broadening factor and the electron escape rate on the bistability performances are analyzed.

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“…For example, two-colour devices that oscillate simultaneously on both modes are useful for terahertz generation by photomixing [4]. Another interesting prospect is fast switching between discrete wavelength channels to enable optical signal routing [5,6]. Switching between wavelength channels can also be the basis for all-optical signal processing based on optical memory and logic functions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Wavelength switching dynamics of two-colour semiconductor lasers with optical injection and feedback

Osborne

Heinricht

Brandonisio

et al. 2012

Semicond. Sci. Technol.

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The wavelength switching dynamics of two-colour semiconductor lasers with optical injection and feedback are presented. These devices incorporate slotted regions etched into the laser ridge waveguide for tailoring the output spectrum. Experimental measurements are presented demonstrating that optical injection in one or both modes of these devices can induce wavelength bistability. Measured switching dynamics with modulated optical injection are shown to be in excellent agreement with numerical simulations based on a simple rate equation model. We also demonstrate experimentally that time-delayed optical feedback can induce wavelength bistability for short external cavity lengths. Numerical simulations indicate that this two-colour optical feedback system can provide fast optical memory functionality based on injected optical pulses without the need for an external holding beam.

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Wavelength switching performance of single- and dual-contact two-mode semiconductor lasers with current modulation

Cited by 4 publications

References 18 publications

Stability of Optically Injected Two‐State Quantum‐Dot Lasers

Stability of Optically Injected Two‐State Quantum‐Dot Lasers

Power-induced lasing state switching and bistability in a two-state quantum dot laser subject to optical injection

Wavelength switching dynamics of two-colour semiconductor lasers with optical injection and feedback

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