Self-Synchronization of Laser Modes and Multistability in Quantum Cascade Lasers

Wójcik, Aleksander K.; Yu, Nanfang; Diehl, Laurent; Capasso, Federico; Belyanin, Alexey

doi:10.1103/physrevlett.106.133902

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…The first indications of phase‐locking in a QCL came in 2009 with the observation of a transition from multistability to a single stable state. The locking in this case was between transverse modes of the laser, [ 34,35 ] existing because of the large width of the optical waveguide (Figure 2b). Locking was explained as a nonlinear coupling mechanism due to four‐wave‐mixing (FWM), originating from the strong optical nonlinearity of the laser transition.…”

Section: Introductionmentioning

confidence: 99%

Laser Frequency Combs with Fast Gain Recovery: Physics and Applications

Piccardo

Capasso

2021

Laser & Photonics Reviews

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The dynamics of semiconductor lasers with fast gain is generally considered to suppress amplitude modulation, resulting in a frequency‐modulated output. Since their first demonstration of frequency comb operation, quantum cascade lasers—ideal representatives of this class of lasers with fast gain dynamics—were indeed shown to emit frequency‐modulated combs. The understanding of these frequency comb regimes has progressively evolved, being refined from simpler arguments to more advanced theories, considering the role of Kerr nonlinearity and linewidth enhancement factor. By now, the traditional frequency‐modulated combs are rather well understood in quantum cascade lasers, but new types of frequency combs have emerged, reopening interesting physics questions in these lasers. Recent advancements on two open frontiers will be discussed: harmonic frequency combs, characterized by mode skipping of many free spectral ranges, and spatiotemporal structures with solitonic features, recently reported in unidirectional ring cavities. These new types of frequency combs open technological and fundamental perspectives, sprouting new interest in quantum cascade lasers.

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Section: Introductionmentioning

confidence: 99%

Laser Frequency Combs with Fast Gain Recovery: Physics and Applications

Piccardo

Capasso

2021

Laser & Photonics Reviews

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“…QCLs are the main devices in several important applications in the optical communications system, medical purposes, imaging systems, remote sensing, biological sciences, astrophysics sciences and space communications [1,2]. Since 1994, QCLs have been improved to get optimum values for static and dynamic properties such increasing lasing wavelength and output power, decreasing the threshold current and operating temperature [3,4]. In nano-cavity, the high quality factor and small volume lead to enhance the mode density and spontaneous emission rate because of Purcell effect [2].…”

Section: Introductionmentioning

confidence: 99%

Investigation the dynamic of nano quantum cascade lasers with optoelectronics feedback

Mohammed¹,

Waried²

2021

sjpas

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In this paper, a theoretical investigation of negative optoelectronic feedback study in Nano quantum cascade lasers is presented. The present rate equation model has been modified to include the nano laser factors such as the Purcell factor and the spontaneous emission factor. The results indicate that the present rate equation model can be using to study the effect of Purcell factor and the spontaneous emission factor on the negative optoelectronic feedback in Nano quantum cascade lasers. It is found that the increase in Purcell factor value leads to increase in photon number and decrease the carrier number in all quantum states. Also, the dynamic of photon number (S) tends to stable at constant value with the increase of Purcell effect i.e. there is small variation in photon number and carrier number( , , ). The decreases in enhanced spontaneous emission factor value leads to increases in carrier number and decreases the photon number and we note small variation in these values.

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“…Indeed, quantum cascade emitters exhibit peculiar properties that can produce rich nonlinear dynamics and phase-coherent phenomena. 29,30 In QCLs, the nonlinear saturation of the intersubband transition plays a significant role in the dynamical properties related to the coupling of the different electromagnetic modes, which is also of first importance for phase coupling, pulse generation, and mode-locking. The latter can even be further enhanced when an OF configuration is applied to the laser.…”

Section: Introductionmentioning

confidence: 99%

Extreme events in quantum cascade lasers

Spitz

Herdt

et al. 2020

Adv. Photon.

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We demonstrate experimentally that mid-infrared quantum cascade lasers (QCLs) operating under external optical feedback exhibit extreme pulses. These events can be triggered by adding small amplitude periodic modulation, with the highest success rate for the case of a pulse-up excitation. These findings broaden the potential applications for QCLs, which have already been proven to be a semiconductor laser of interest for spectroscopic applications and countermeasure systems. The ability to trigger extreme events paves the way for optical neuron-like systems where information propagates as a result of high intensity bursts.

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Self-Synchronization of Laser Modes and Multistability in Quantum Cascade Lasers

Cited by 15 publications

References 19 publications

Laser Frequency Combs with Fast Gain Recovery: Physics and Applications

Laser Frequency Combs with Fast Gain Recovery: Physics and Applications

Investigation the dynamic of nano quantum cascade lasers with optoelectronics feedback

Extreme events in quantum cascade lasers

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