A high-sensitivity high-resolution intravascular photoacoustic catheter through mode cleaning in a graded-index fiber [PDF]
Photoacoustics, 2023 Intravascular photoacoustic imaging has been developed to evaluate the possibility of plaque rupture in atherosclerosis by high spatial resolution imaging of lipid.
Yuhao Yuan +6 more
doaj +2 more sources
Near-infrared multispectral photoacoustic microscopy using a graded-index fiber amplifier [PDF]
Photoacoustics, 2016 We demonstrate optical resolution photoacoustic microscopy (OR-PAM) of lipid-rich tissue using a multi-wavelength pulsed laser based on nonlinear fiber optics.
Takashi Buma +2 more
doaj +2 more sources
Pulsed Raman Lasing in Diode-Pumped Multimode Graded-Index Fiber with Tuned Femtosecond-Laser-Inscribed Bragg Grating [PDF]
MicromachinesRaman lasers based on multimode graded-index (GRIN) fibers directly pumped by laser diodes are the object of intensive research, promising to produce high-power, high-quality beams at new wavelengths.
Alexey G. Kuznetsov +4 more
doaj +2 more sources
Supercontinuum generation with extended bandwidth and improved purity in graded-index ring-core fiber [PDF]
Scientific ReportsIn this paper, we numerically investigate the impact of shape factor (k) on the mode properties of graded-index ring-core fiber (GIRCF). A 50 mol% Ge-doped GIRCF with shape factor of 2 is devised to generate supercontinuum (SC) carrying orbital angular ...
Qinru Peng +8 more
doaj +2 more sources
High Power All-Fiber Supercontinuum System Based on Graded-Index Multimode Fibers
Applied Sciences, 2022 An all-fiber supercontinuum source based on graded-index multimode fibers is reported. The supercontinuum source is based on a homemade mode-locked oscillator and a three-stage picosecond amplifier, which obtained the supercontinuum by a graded-index ...
Haitao Zhang +4 more
doaj +1 more source
Parabolic-Index Ring-Core Fiber Supporting High-Purity Orbital Angular Momentum Modes
Sensors, 2023 We design a graded-index ring-core fiber with a GeO2-doped silica ring core and SiO2 cladding. This fiber structure can inhibit the effect of spin-orbit coupling to mitigate the power transfer among different modes and eventually enhance the orbital ...
Yuanpeng Liu +7 more
doaj +1 more source
Frontiers in Physics, 2022 We investigate the input and propagation characteristics and geometric parametric instability of the partial Gaussian beam limited by the fiber face area in a graded-index multimode fiber.
Guangye Yang +14 more
doaj +1 more source
Spatiotemporal Soliton Attractor in Multimode Graded-index Fibers [PDF]
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021 There is recently a considerable interest in nonlinear optical effects in multimode fibers (MMFs). Here we present the experimental evidence, supported by numerical simulations, that an initially excited multimode femtosecond soliton initially composed by few low-order transverse modes of a graded-index (GRIN) MMF irreversibly decays into a singlemode ...
Ferraro, Mario +3 more
openaire +1 more source
Reciprocal Inverse Graded Index Fiber (R-IGIF) for OAM-SDM Networks
IEEE Photonics Journal, 2022 In this article, we propose, design, and numerically assess a novel parametric refractive index profile for optical fiber, which we refer to as reciprocal-inverse graded index fiber (R-IGIF).
Alaaeddine Rjeb +5 more
doaj +1 more source
Measurements of Intermodal Dispersion In Graded Index Optical Fiber [PDF]
Engineering and Technology Journal, 2010 The aim of this research is to examine experimentally the laser pulsetransmittance in graded index optical fiber. However attention is paid on the evaluationof intermodal dispersion.
Mohamed Saleh Ahmed +2 more
doaj +1 more source