Results 101 to 110 of about 5,482 (285)

Implementation of an Active Control System for Kerr Optical Soliton Frequency Comb Based on FPGA

open access: yesChinese Journal of Magnetic Resonance
Due to their millimeter-scale size and low pump power threshold, Kerr optical soliton frequency combs have emerged as a key technology for chip-scale optical atomic clock research.
LIU Kangqi   +5 more
doaj  

Multimodal MRI and multiomics reveal high‐risk neurophenotype in brain‐gut circuits as therapeutic target for Crohn's disease

open access: yesInterdisciplinary Medicine, EarlyView.
Through a translational framework combining prospective dual‐center clinical cohorts with dextran sulfate sodium‐induced colitis models, this work integrated advanced neuroimaging, multi‐omics and neuromodulation interventions to redefine the high‐risk neurophenotype as a sustained pathogenic driver rather than a mere phenomenon, proposing brain‐gut ...
Xuehua Li   +24 more
wiley   +1 more source

Implantable drug delivery system: Frontiers of medicine‐engineering interdisciplinary

open access: yesInterdisciplinary Medicine, EarlyView.
This review systematically summarizes the driving mechanisms of implantable on‐demand drug delivery systems (IDDS), including endogenous, exogenous, and closed‐loop strategies. It highlights the pivotal roles of flexible electronics and miniaturization in enhancing the tissue conformity and spatial adaptability.
Yu Zeng   +9 more
wiley   +1 more source

Portable frequency combs for optical frequency metrology

open access: yesOptics Express, 2012
We demonstrate a temperature stabilized CMOS-compatible frequency comb based on an integrated optical micro-ring resonator. The instrument operates in the wavelength interval 1520-1600 nm with a wide free spectral range (FSR) of 200 GHz. By embedding a highly sensitive “resistive thermal device” (RTD) on the surface of the chip to provide temperature ...
Chris Lee   +4 more
openaire   +1 more source

Metabolic feature profiling and metabolic vulnerability in acute lymphoblastic leukemia

open access: yesInterdisciplinary Medicine, EarlyView.
For the first time, our study develops a novel metabolic classification and subtyping program, metabolic reprogramming‐based classifier for acute lymphoblastic leukemia, using internal PDT‐ALL‐2016 and external cohorts, which dissects metabolic profiling, clinical outcome, and therapeutic vulnerability for precision metabolic intervention in ALL ...
Xiaojie Liang   +13 more
wiley   +1 more source

Difference-frequency combs in cold atom physics

open access: yes, 2016
Optical frequency combs provide the clockwork to relate optical frequencies to radio frequencies. Hence, combs allow optical frequencies to be measured with respect to a radio frequency where the accuracy is limited only by the reference signal. In order
Thomas Puppe   +44 more
core   +1 more source

Weak-Light Phase-Locking Time Delay Interferometry with Optical Frequency Combs. [PDF]

open access: yesSensors (Basel), 2022
Xu M   +6 more
europepmc   +1 more source

Broadband Mode Converter With Customizable Modal Ratio Leveraging Subwavelength Engineering for Advanced Multimode Silicon Photonics

open access: yesLaser &Photonics Reviews, EarlyView.
This work introduces a customizable mode converter for multimode silicon photonics, enabling precise control over the conversion ratio between optical modes. The device operates across a broad wavelength range (1350–1700 nm) with 15 distinct conversion levels.
Raquel Fernández de Cabo   +7 more
wiley   +1 more source

Frequency-doubled chirped-pulse dual-comb generation in the near-UV: combined vs separated beam investigations of Rb atoms and NO2 near 420 nm

open access: yesScientific Reports
We describe an electro-optic dual-comb system that operates in the near-infrared (near-IR) region to generate optical frequency combs in the near-UV by sum frequency generation in two configurations.
Jasper R. Stroud, David F. Plusquellic
doaj   +1 more source

Toward Highest Frequency, Phase‐Sensitive Electric Field Sensing Enabled by Plasmonic Circuits

open access: yesLaser &Photonics Reviews, EarlyView.
An electromagnetic field sensor using an optical sensor head for distortion‐free, high‐sensitivity measurements with potential for high‐frequency operation is presented. The frequency response is enabled by an antenna‐integrated plasmonic modulator. The sensitivity is calculated, and optimizations to obtain thermal‐background‐limited sensitivity are ...
Michael Baumann   +5 more
wiley   +1 more source

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