Coexistence of 11 Tbps (110×100 Gbps) classical optical communication and quantum key distribution based on single-mode fiber.

Integrating quantum key distribution (QKD) with classical optical communication is a deployment-friendly and cost-effective approach to advancing QKD network implementation. However, the noise introduced by intense classical signals into the quantum channel severely impacts the performance of the QKD system, presenting challenges for long-distance coexistence transmission. In this paper, we successfully demonstrate the simultaneous propagation of QKD and optical transport network (OTN) in the C-band over distances exceeding 100 km.

Coexistence of 1 Tbps classical optical communication and quantum key distribution over a 100.96 km few-mode fiber.

The integration of quantum key distribution (QKD) and classical optical communication has attracted widespread attention. In this Letter, we experimentally demonstrate a real-time co-propagation of 1 Tbps for 10 classical channels with one discrete-variable QKD channel in the weakly coupled few-mode fiber (FMF). Based on the selection of optimal device parameters and wavelength assignment of classical channels, as well as the optimization of equipment performance, a secure key rate of as high as 2.

Shannon entropy method of small-scale self-focusing assessment in high-power laser systems.

Through analysis of near-field beam profiles, we propose a method using Shannon entropy to assess the development of small-scale self-focusing during laser propagation and amplification in high-power laser systems. In this method, the entropy curve that corresponds to increasing B integral displays an evident turning point at which small-scale self-focusing starts to rapidly develop. In contrast to classical methods using contrast, modulation, or power spectral density, the proposed method provides the B integral criterion more clearly and objectively.

The Glu727 Allele of Thyroid Stimulating Hormone Receptor Gene is Associated with Osteoporosis.

Background: Published data indicate that thyroid stimulating hormone receptor (TSHR) activities are associated with osteoporosis in some patients.

Aim: This study aimed to elucidate whether a given polymorphism of the TSHR gene is associated with osteoporosis.

Materials And Methods: One hundred and fifty subjects with osteoporosis were recruited in this study.

[Survivin and COX-2 expressions in giant cell tumor of bone and their relation to the prognosis].

Objective: To investigate the expression of survivin and COX-2 in giant cell tumor of bone (GCT) and explore the prognostic factors for GCT.

Methods: The expressions of survivin and COX-2 in 39 GCT tissues of three Jaffe grades and 4 normal bone tissues were detected by immunohistochemical staining, and the data were analyzed in relation to the clinicopathological features of the patients.

Results: The expressions of survivin and COX-2 were significantly higher in the GCT tissues than in normal bone tissues (P<0.