Space-time wave packets in multimode optical fibers with controlled dynamic motions and tunable group velocities.

Space-time wave packets (STWPs) with correlated spatial and frequency degrees of freedom exhibit time-dependent spatial interference, thereby giving rise to interesting dynamic evolution behaviors. While versatile spatiotemporal phenomena have been demonstrated in freely propagating fields, coupling spatiotemporal light into multimode fibers remains a fundamental experimental challenge. Whereas synthesizing freely propagating STWPs typically relies on a continuum of plane-wave modes, their multimode-fiber counterparts must be constructed from the discrete set of fiber modes whose propagation constants depend on fiber structures.

Bloodstream infection caused by Vibrio plantisponsor in an immunocompromised patient: diagnostic challenges and clinical implications.

Background: Vibrio plantisponsor was first isolated in 2011 from mangrove-associated wild rice roots in India. Human infections caused by this species have not been reported previously.

Case Presentation: An 80-year-old man with prostate adenocarcinoma was admitted to the hospital with fever and chills.

Modified time-to-positivity as a crucial determinant of short-term mortality among adults with community-onset monomicrobial bloodstream infections.

The potential performance of time-to-positivity (TTP) in predicting the prognosis of individuals experiencing Bloodstream infections (BSIs) has achieved little consensus. The retrospective cohort of 1015 treatment-naive adults with community-onset monomicrobial BSIs aimed to assess the performance of TTP and modified TTP (mTTP, TTP plus transportation time) in predicting 30-day mortality after adjusting for prognostic confounders, particularly the time-to-appropriate antibiotic (TtAa). Through Spearman's correlation, a significant linear-by-linear association (ρ = -0.

Chlamydia trachomatis infection among at-risk populations in Taiwan: Emergence of genovariant L2b and treatment response to antimicrobials.

Background: Chlamydia trachomatis infection is one of the most common sexually transmitted infections (STIs). This study investigated the prevalence and genotype distribution of C. trachomatis, and treatment response, focusing on the recent emergence of genovariant L2b in Taiwan.

Demonstration of optical de-aggregation of a single 10-Gbit/s QPSK signal to two 5-Gbit/s OOK signals using nonlinear wave mixing and constellation biasing.

Optical data format de-aggregation enables the conversion from a single higher-order phase-encoded data channel coming from a high-bandwidth network into two amplitude-modulated signals that may be commonly used in lower-bandwidth local information systems. We experimentally demonstrate the optical de-aggregation of a 10-Gbit/s quadrature phase-shift keyed (QPSK) signal into two 5-Gbit/s on-off keyed (OOK) signals. Using wave mixing in a highly nonlinear fiber (HNLF), we apply two optical effects simultaneously to the input signal: (a) constellation squeezing, in which the 10-Gbit/s QPSK signal is de-aggregated into two different 5-Gbit/s binary phase-shift keying (BPSK) signals, and (b) constellation biasing, in which the coherent addition of a continuous-wave (CW) bias and the two BPSK signals shifts the data constellation points, resulting in only amplitude modulation and two different 5-Gbit/s OOK signals.