Ultrahigh-speed and widely tunable wavelength conversion based on cross-gain modulation in a quantum-dot semiconductor optical amplifier

Matsuura, Motoharu; Raz, O.; Gomez-Agis, Fausto; Calabretta, Nicola; Dorren, H.J.S.

doi:10.1364/oe.19.00b551

Cited by 48 publications

(15 citation statements)

References 23 publications

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“…1,2 They provide ultrafast gain recovery, low threshold currents, and allow for multi wavelength amplification as well as pattern-free signal amplification with high bit rates and ultrafast nonlinear signal processing. [3][4][5][6] For operation in the optical telecommunication windows, zero-dimensional (0D) InAs QDs are typically coupled to a two-dimensional (2D) carrier reservoir and embedded in a GaAs or InP matrix. Quantum dots emitting at 1.3 lm support a confined ground state (GS) and one to several excited states (ES).…”

mentioning

confidence: 99%

Gain dynamics of quantum dot devices for dual-state operation

Kaptan

Schmeckebier

Herzog

et al. 2014

Applied Physics Letters

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Ground state gain dynamics of In(Ga)As-quantum dot excited state lasers are investigated via single-color ultrafast pump-probe spectroscopy below and above lasing threshold. Two-color pump-probe experiments are used to localize lasing and non-lasing quantum dots within the inhomogeneously broadened ground state. Single-color results yield similar gain recovery rates of the ground state for lasing and non-lasing quantum dots decreasing from 6 ps to 2 ps with increasing injection current. We find that ground state gain dynamics are influenced solely by the injection current and unaffected by laser operation of the excited state. This independence is promising for dual-state operation schemes in quantum dot based optoelectronic devices. V C 2014 AIP Publishing LLC. [http://dx.

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mentioning

confidence: 99%

Gain dynamics of quantum dot devices for dual-state operation

Kaptan

Schmeckebier

Herzog

et al. 2014

Applied Physics Letters

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“…This filter-assisted technique offers the advantages of hardwaresaving, structural simplicity, flexible operation, reconfigurability, robustness to environmental changes, reduced polarization dependence, and improved power efficiency [25]- [27]. However, in QD-SOAs this technique has been exploited so far only for wavelength conversion [28]- [30] and not for all-optical logic purposes. Thus, in this paper we propose to realize the XOR gate by means of a QD-SOA and OF combination.…”

Section: Introductionmentioning

confidence: 99%

“…The center wavelengths of the three signals, λ A (A), λ B (B) and λ p (CW), 0733-8724 © 2013 IEEE must be such that the wavelength separation of signals A and B from the CW signal lies within the homogeneous broadening of the QD-SOA in the 1550 nm region [21], [22], [24]. Under this condition, signals A and B can serve as the pumps, while the CW signal as the probe [28]- [30]. Then this probe-dual pump scheme can function as XOR gate as follows.…”

Section: Introductionmentioning

confidence: 99%

All-Optical XOR Gate Using Single Quantum-Dot SOA and Optical Filter

Dimitriadou

Zoiros

2013

J. Lightwave Technol.

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In this paper, we propose to implement an all-optical XOR gate for 160 Gb/s return-to-zero data signals using a single quantum-dot semiconductor optical amplifier (QD-SOA) assisted by a detuned optical filter (OF). These two elements are connected in series in a probe-dual pump configuration. By conducting numerical simulations, we thoroughly investigate and assess the impact of the critical performance parameters on the Q 2 -factor. The analysis of the obtained results against this metric enables us to specify the data signals peak power, QD-SOA small signal gain, current density, electron relaxation time from the excited state to the ground state and linewidth enhancement factor, and OF detuning, bandwidth and shape, for which the XOR logic is executed at the target data format and rate both with logical correctness and high quality. The confirmation of its design feasibility combined with its simplicity and ultrafast capability makes the XOR gate scheme promising for exploitation in all-optical signal processing and switching applications.Index Terms-All-optical XOR gate, optical filtering, quantumdot semiconductor optical amplifier (QD-SOA).

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“…Harnessing coherent processes, the deterministic nature of which allows steering the energy flow in the coupled light–matter system, opens up new avenues for applications also in mesoscopic and macroscopic devices6789. For a semiconductor device operating in the coherent regime based on Rabi oscillations, the comparatively slow gain recovery process via replenishing the active carriers from a reservoir10, hitherto limiting the performance of devices to data rates of about 200 Gb s −1 (refs 11, 12), could be avoided. Implementing coherent sub-picosecond, not population lifetime limited processes, for example, ultrafast switching, opens the new field of coherent photonics.…”

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confidence: 99%

Quantum coherence induces pulse shape modification in a semiconductor optical amplifier at room temperature

et al. 2013

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Coherence in light-matter interaction is a necessary ingredient if light is used to control the quantum state of a material system. Coherent effects are firmly associated with isolated systems kept at low temperature. The exceedingly fast dephasing in condensed matter environments, in particular at elevated temperatures, may well erase all coherent information in the material at timescales shorter than a laser excitation pulse. Here we show for an ensemble of semiconductor quantum dots that even in the presence of ultrafast dephasing, for suitably designed condensed matter systems quantum-coherent effects are robust enough to be observable at room temperature. Our conclusions are based on an analysis of the reshaping an ultrafast laser pulse undergoes on propagation through a semiconductor quantum dot amplifier. We show that this pulse modification contains the signature of coherent light-matter interaction and can be controlled by adjusting the population of the quantum dots via electrical injection.

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Ultrahigh-speed and widely tunable wavelength conversion based on cross-gain modulation in a quantum-dot semiconductor optical amplifier

Cited by 48 publications

References 23 publications

Gain dynamics of quantum dot devices for dual-state operation

Gain dynamics of quantum dot devices for dual-state operation

All-Optical XOR Gate Using Single Quantum-Dot SOA and Optical Filter

Quantum coherence induces pulse shape modification in a semiconductor optical amplifier at room temperature

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