Results 41 to 50 of about 2,978,769 (241)

Dual-Comb Ranging

open access: yesEngineering, 2018
Absolute distance measurement is a fundamental technique in mobile and large-scale dimensional metrology. Dual-comb ranging is emerging as a powerful tool that exploits phase resolution and frequency accuracy for high-precision and fast-rate distance ...
Zebin Zhu, Guanhao Wu
doaj   +1 more source

Frequency-comb-linearized, widely tunable lasers for coherent ranging

open access: yes, 2023
Tunable lasers, with the ability to continuously adjust their emission wavelengths, have found widespread applications across various fields such as biomedical imaging, coherent ranging, optical communications and spectroscopy.
Baoqi Shi (14776669)   +7 more
core   +1 more source

Aluminum nitride as nonlinear optical material for on-chip frequency comb generation and frequency conversion

open access: yesNanophotonics, 2016
A number of dielectric materials have been employed for on-chip frequency comb generation. Silicon based dielectrics such as silicon dioxide (SiO2) and silicon nitride (SiN) are particularly attractive comb materials due to their low optical loss and ...
Jung Hojoong, Tang Hong X.
doaj   +1 more source

Spectral line-by-line pulse shaping of on-chip microresonator frequency combs [PDF]

open access: yes, 2011
Recently, on-chip comb generation methods based on nonlinear optical modulation in ultrahigh-quality-factor monolithic microresonators have been demonstrated, where two pump photons are transformed into sideband photons in a four-wave-mixing process ...
Lei Chen   +15 more
core   +1 more source

Towards generation of optical frequency comb in the short-wavelength visible region using periodically poled lithium niobate waveguides

open access: yesResults in Optics, 2021
We demonstrate the spectral broadening of an octave-spanning erbium-based frequency comb in two types of periodically poled lithium niobate (PPLN) waveguides.
Yuma Goji   +4 more
doaj   +1 more source

Proposed Scheme for Ultra-Flat Optical Frequency Comb Generation Based on Dual-Drive Mach–Zehnder Modulators and Bidirectional Recirculating Frequency Shifting in Single Loop

open access: yesPhotonics, 2022
Recirculating frequency shifting has attracted much attention for its advantages in the generation of the flexible and high-quality optical frequency comb.
Yu Liu, Shibao Wu
doaj   +1 more source

Association Between Motor Pathway Damage and Motor Deficit in Upper and Lower Limb in People With MS

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Corticospinal tract damage is common in people with MS, but the degree of clinical symptoms varies. We hypothesize that corticospinal tract lesions are more extensive and severe in people with MS with motor impairments in both upper and lower limbs.
Mathilde Liffran   +13 more
wiley   +1 more source

Broadband optical frequency comb generation based on single electro-absorption modulation driven by radio frequency coupled signals

open access: yesFrontiers of Optoelectronics, 2022
Broadband optical frequency comb (OFC) generation based on a single electro-absorption modulator (EAM) is proposed. The EAM is driven by a radio frequency (RF) multi-frequency signal generated by a multiplication coupler composed of an electrical power ...
Pan Jiang, Peili Li, Yiming Fan
doaj   +1 more source

Stable 100 GHz Pulses Generated by injection locking of multiple lasers to an optical frequency comb

open access: yes, 2014
Optical frequency combs (OFCs) can generate a wide bandwidth of regularly spaced modes with high frequency stability. Besides frequency and time metrology, OFCs can also have applications in arbitrary waveform generation and telecommunications by ...
Wu, D.S., Slavík, R., Richardson, D.J.
core   +1 more source

Spatially Regulated Lithium Plating via Li2O‐Rich Interphase Enables Durable Fast‐Charging Hybrid Lithium Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A Li2O‐rich solid electrolyte interphase (SEI) is engineered on graphite through a propylene carbonate‐based electrolyte to spatially regulate Li plating. The homogeneous interphase lowers Li nucleation barriers, promotes conformal Li deposition around graphite particles, and suppresses dendritic accumulation, enabling durable hybrid Li‐ion/Li‐metal ...
Robert Kuphal   +8 more
wiley   +1 more source

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