Results 91 to 100 of about 5,269,631 (254)

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

Frequency-tuning dual-comb spectroscopy using silicon Mach-Zehnder modulators [PDF]

open access: yes, 2020
International audienceDual-comb spectroscopy using a silicon Mach-Zehnder modulator is reported for the first time. First, the properties of frequency combs generated by silicon modulators are assessed in terms of tunability, coherence, and number of ...
Vivien, Laurent   +7 more
core   +1 more source

Evidence for adaptive explanations of semelparity in animals

open access: yesBiological Reviews, EarlyView.
ABSTRACT Semelparity, the reproductive strategy of reproducing once, is widespread but uncommon in animals. Classes of models to explain the evolution of semelparity are based either on age structure and mortality schedules – demographic models in which high post‐reproductive mortality risk favours high reproductive effort and semelparity results from ...
Diana O. Fisher   +1 more
wiley   +1 more source

Direct Kerr-frequency-comb atomic spectroscopy

open access: yes, 2018
Microresonator-based soliton frequency combs - microcombs - have recently emerged to offer low-noise, photonic-chip sources for optical measurements.
Jordan R. Stone (3963479)   +10 more
core   +1 more source

Femtosecond optical frequency comb-based tandem interferometer [PDF]

open access: yes, 2009
The principle of a unique interferometer, called a femtosecond optical frequency comb-based (FOFC-based) tandem interferometer, is proposed and demonstrated for the first time.
Takamasu, K.   +7 more
core   +1 more source

Advances in Unraveling the Structure and Sodium‐Ion Storage Behaviors of Hard Carbons: From Basic to Extended Characterization Techniques

open access: yesCarbon Energy, EarlyView.
This review is devoted to introducing the structures and sodium storage mechanisms of hard carbon materials and analyzing the correlated advanced characterization techniques. The advanced characterization techniques are categorized based on the classification of signal sources.
Jiechang Gao   +6 more
wiley   +1 more source

Micro-resonator frequency comb source based time domain Hilbert transform

open access: yes, 2016
We demonstrate a temporal Hilbert transformer based on an integrated microresonator optical frequency comb source, and perform a temporal transform of a Gaussian pulse with a fullwidth half maximum of 0.12ns. © OSA 2016.
Sai T. Chu   +15 more
core   +1 more source

Dual-frequency comb in fiber Fabry–Perot resonator

open access: yesAPL Photonics
This paper presents a novel approach to dual-frequency comb generation utilizing a single fiber Fabry–Perot resonator, advancing the implementation of these sources in fiber-based systems. Dual-comb applications such as spectroscopy, ranging, and imaging,
Thomas Bunel   +5 more
doaj   +1 more source

Modular One‐Pot Access to π‐Expanded Tetrakis(Phenothiazinyl)‐Silanes With Broadly Tunable Redox and Emission Properties

open access: yesChemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.
A library of 21 tetrakis(phenothiazinyl)‐substituted silanes with broadly variable substituent decoration, which are fully reversible multistage redox systems with intense tunable emission from deep blue to yellow–green (441–533 nm), was rapidly synthesized by bromine–lithium exchange/borylation–Suzuki coupling of tetrakis(4‐bromophenyl)silane or by ...
Thomas P. M. Merke   +4 more
wiley   +1 more source

Nanosecond channel-switching exact optical frequency synthesizer using an optical injection phase-locked loop (OIPLL) [PDF]

open access: yes, 2004
Experimental results are reported on an optical frequency synthesizer for use in dynamic dense wavelength-division-multiplexing networks, based on a tuneable laser in an optical injection phase-locked loop for rapid wavelength locking.
Duser, M   +6 more
core  

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