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Keywords = nondegenerate optical parametric amplifier

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9 pages, 1569 KiB  
Article
Compact 6 dB Two-Color Continuous Variable Entangled Source Based on a Single Ring Optical Resonator
by Ning Wang, Shanna Du and Yongmin Li
Appl. Sci. 2018, 8(3), 330; https://doi.org/10.3390/app8030330 - 26 Feb 2018
Cited by 4 | Viewed by 3601
Abstract
Continuous-variable entangled optical beams at the degenerate wavelength of 0.8 μm or 1.5 μm have been investigated extensively, but separately. The two-color entangled states of these two useful wavelengths, with sufficiently high degrees of entanglement, still lag behind. In this work, we analyze [...] Read more.
Continuous-variable entangled optical beams at the degenerate wavelength of 0.8 μm or 1.5 μm have been investigated extensively, but separately. The two-color entangled states of these two useful wavelengths, with sufficiently high degrees of entanglement, still lag behind. In this work, we analyze the various limiting factors that affect the entanglement degree. On the basis of this, we successfully achieve 6 dB of two-color quadrature entangled light beams by improving the escape efficiency of the nondegenerate optical amplifier, the stability of the phase-locking servo system, and the detection efficiency. Our entangled source is constructed only from a single ring optical resonator, and thus is highly compact, which is suitable for applications in long-distance quantum communication networks. Full article
(This article belongs to the Section Optics and Lasers)
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