Electro-optically spectrum narrowed, multiline intracavity optical parametric oscillators

Chang, Wei-Hsiang; Chung, Hung-Pin; Chou, Y. Y.; Geiß, Reinhard; Yang, Shiaw‐Der; Pertsch, Thomas; Chen, Y. H.

doi:10.1364/oe.24.028905

Cited by 9 publications

(1 citation statement)

References 17 publications

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“…It arouses our interest. As early as 1990, the sub-natural linewidth in the spontaneous emission spectrum of a threelevel atom driven by two beams of light has been theoretically predicted by Narducci et al [40], and a large number of experiments subsequently observed this phenomenon [41][42][43][44][45]. Applications of the spectral line narrowing include laser spectroscopy [46] and quantum sensing [47].…”

Section: Introductionmentioning

confidence: 95%

Ultranarrow spectral line of the radiation in double qubit-cavity ultrastrong coupling system

Zhao,

Wu,

Yang

et al. 2020

Preprint

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We investigate the ultranarrow spectrum and non-Gaussian feature of a circuit QED system with two qubits ultrastrongly coupled to a single-mode cavity. By adjusting the frequency of the driving field to resonate with the cavity frequency at the point of avoided-level crossing, we can get an equivalent four-level dressed state model. The vacuum-induced quantum interference between two transition pathways couples the slow decaying incoherent components of the density matrix into the equations of the sidebands, thereby an ultranarrow peak appeared at the line center of the cavity emission spectrum. This result provides a possibility for the study of quantum interference effect in the USC system. Moreover, the two metastable states with electronic shelving in the nondegenerate four-level system enhance the effect of spectral line narrowing. Finally, we also explore the intensity-amplitude correlation of the system, and the non-Gaussian feature of the ultrastrong coupling system can be identified, indicating that the system has broad application prospects in the field of nonlinear optics and preparation of non-classical states.

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