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We present a propagation model for the dynamics of distributed feedback Brillouin lasers. The model is applied to the recently demonstrated DFB Brillouin laser based on a π-phase shifted grating in a highly nonlinear silica fiber. Steady state results agree with the experimental values for threshold and efficiency. We also simulate a DFB Brillouin laser in chalcogenide and find sub-milliwatt thresholds and the possibility of centimeter-long Brillouin-DFB's.
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http://dx.doi.org/10.1364/OE.21.016191 | DOI Listing |
Arch Cardiovasc Dis
September 2025
CIC INSERM 1410, 97410 Saint-Pierre, France; Department of Cardiology, La Réunion University Hospital, 97400 Saint-Denis, France. Electronic address:
Background: Artificial intelligence has emerged as a promising tool to optimize patient care in the field of cardiovascular medicine. However, data on its adoption and utilization by healthcare professionals are scarce.
Aim: To explore the factors that support or hinder the adoption of artificial intelligence in cardiology in France.
Biol Cybern
September 2025
Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, 61801, IL, USA.
In this article, a biophysically realistic model of a soft octopus arm with internal musculature is presented. The modeling is motivated by experimental observations of sensorimotor control where an arm localizes and reaches a target. Major contributions of this article are: (i) development of models to capture the mechanical properties of arm musculature, the electrical properties of the arm peripheral nervous system (PNS), and the coupling of PNS with muscular contractions; (ii) modeling the arm sensory system, including chemosensing and proprioception; and (iii) algorithms for sensorimotor control, which include a novel feedback neural motor control law for mimicking target-oriented arm reaching motions, and a novel consensus algorithm for solving sensing problems such as locating a food source from local chemical sensory information (exogenous) and arm deformation information (endogenous).
View Article and Find Full Text PDFPhotoacoustics
October 2025
Hubei Key Laboratory of Intelligent Wireless Communications, Hubei Engineering Research Center of Intelligent IOT technology, College of Electronics and Information Engineering, South-Central Minzu University, Wuhan 430074, China.
A novel gourd-type photoacoustic cell (GTPAC) has been developed, featuring a highly reflective, polished gold film-coated inner wall that minimizes optical loss and maximizes light utilization efficiency. GTPAC integrates two coupled spherical chambers with a radius ratio 2:3, which is close to the golden ratio. Its unique Gaussian curvature distribution enables multi-directional, disordered light beam reflection without complex optical alignment.
View Article and Find Full Text PDFPsychiatr Serv
September 2025
Center for the Study of Healthcare Innovation, Implementation, and Policy, Health Systems Research (HSR), U.S. Department of Veterans Affairs (VA) Greater Los Angeles Healthcare System, Los Angeles.
Veterans experiencing homelessness face barriers to traditional U.S. Department of Veterans Affairs (VA) care, even when temporarily housed on VA grounds.
View Article and Find Full Text PDFFront Biosci (Landmark Ed)
August 2025
Department of Biomedical Sciences, University of Missouri-Kansas City, School of Medicine, Kansas City, MO 64108, USA.
Glutamate is an important neurotransmitter in the mammalian brain. Among the receptors that glutamate interacts with is metabotropic glutamate (mGlu) receptor 2, a Gα-coupled receptor. These receptors are primarily located on glutamatergic nerve terminals and act as presynaptic autoreceptors to produce feedback inhibition of glutamate release.
View Article and Find Full Text PDF