Results 61 to 70 of about 25,039 (305)
Association Between Motor Pathway Damage and Motor Deficit in Upper and Lower Limb in People With MS
Annals 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
Laser Frequency Combs for Astronomical Observations [PDF]
Science, 2008 A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require measurements of Doppler velocity drifts of ∼1 centimeter per second per year, and astronomical spectrographs have not yet been calibrated to this tolerance.
Steinmetz, T. +11 more
openaire +4 more sources
Advanced Functional Materials, EarlyView.The polymer wall stabilized dye‐doped liquid crystals (PWLCs) enhance the sensitivity of photoinduced molecular reorientation in dye‐doped LC systems. The PWLC with an invisible polymer wall successfully reduces the threshold intensity and functions as an optical limiter under the incidence of low intensity light laser source.
Junki Yokota +6 more
wiley +1 more source
Controllable Kerr and Raman-Kerr frequency combs in functionalized microsphere resonators
Nanophotonics, 2019 Optical frequency comb (OFC) based on the whispering-gallery-mode microresonator has various potential applications in fundamental and applied areas. Once the solid microresonator is fabricated, its structure parameters are generally unchanged. Therefore,
Zhu Song +6 more
doaj +1 more source
Stabilized
IEEE Photonics Journal, 2017 We have designed and fabricated a Kerr frequency comb oscillator with 27.5 GHz repetition rate by pumping a whispering gallery mode crystalline resonator with a laser at 1560 nm center wavelength. The oscillator is stabilized to the Rb$^{87}
Wei Liang +5 more
doaj +1 more source
Frontiers 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
Resonant electro-optic frequency comb [PDF]
Nature, 2019 High speed optical telecommunication is enabled by wavelength division multiplexing, whereby hundreds of individually stabilized lasers encode the information within a single mode optical fiber. In the seek for larger bandwidth the optical power sent into the fiber is limited by optical non-linearities within the fiber and energy consumption of the ...
Rueda, A. +4 more
openaire +4 more sources
Optical Frequency Comb Generation in Monolithic Microresonators [PDF]
, 2011 This thesis presents an entirely novel approach for frequency comb generation based on nonlinear frequency conversion in micrometer sized optical resonators.
Del'Haye, P., Del'Haye, Pascal
core
A monolithic MQW InP-InGaAsP-Based optical comb generator
, 2007 We report the first demonstration of a monolithic optical-frequency comb generator. The device is based on multi-section quaternary/quaternary eight-quantum-well InP-InGaAsP material in a frequency-modulated (FM) laser design. The modulation is generated
Renaud, C C +10 more
core +1 more source
Frequency-modulated comb in a VECSEL
, 2020 Optical frequency combs based on mode-locked lasers have revolutionized many areas of science and technology, such as precision metrology, optical frequency synthesis or telecommunications.
Avijit Barua (10150082) +7 more
core +1 more source