Anti-correlation phenomena in quantum cascade laser frequency combs

Year: 2023

Authors: Chomet B., Gabbrielli T., Gacemi D., Cappelli F., Consolino L., De Natale P., Kapsalidis F., Vasanelli A., Todorov Y., Faist J., Sirtori C.

Autors Affiliation: Univ PSL, Univ Paris Cite, Sorbonne Univ, Lab Phys,Ecole Normale Super,CNRS, Ens, Paris, France; CNR, Ist Nazl Ott, Via Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; LENS European Lab Nonlinear Spect, Via Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; Swiss Fed Inst Technol, Inst Quantum Elect, Zurich, Switzerland.

Abstract: In quantum cascade laser frequency combs, the intensity distribution of the optical spectrum can be split into two well-separated lobes of longitudinal modes that, even when far apart, have a common phase relation and preserve equal frequency separation. The temporal dynamics of two lasers emitting at 4.4 and 8.1 mu m operating in this bilobed regime are here investigated. The laser intensity shows a peculiar temporal behavior associated with the spectral features whereby, every half a round-trip, the total emitted power switches from one lobe to the other, with a perfect temporal anti-correlation. The anti-correlation between the lobes is also observed in the intensity noise figure of the emission. This coherent phenomenon arises from gain nonlinearities induced by spatial hole burning and the extremely fast gain dynamics typical of quantum cascade lasers.

Journal/Review: APL PHOTONICS

Volume: 8 (10)      Pages from: 106106-1  to: 106106-7

More Information: The authors acknowledge financial support by the ENS-Thales Chair and the European Union’s Horizon 2020 Research and Innovation Program (Qombs Project, FET Flagship on Quantum Technologies Grant No. 820419; Laserlab-Europe Project Grant No. 871124; MUQUABIS Project Grant No. 101070546), the European Union’s QuantERA II (Grant No. 101017733, QATACOMB Project), the European Union’s NextGenerationEU Program, I-PHOQS Infrastructure (IR0000016, ID D2B8D520, CUP B53C22001750006), and the Ile-de-France Region in the fram ework of DIM SIRTEQ.
KeyWords: Nobel Lecture; Generation; Multimode; States; Light
DOI: 10.1063/5.0160103

Citations: 4
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