Results 21 to 30 of about 1,063,886 (319)

High-power amplified spontaneous emission pulses with tunable coherence for efficient non-linear processes

open access: yesScientific Reports, 2021
We report on a detailed study of an amplified spontaneous emission source operated in a pulsed regime with particular attention paid to the influence of high-intensity chaotic temporal events on the generation of nonlinear processes. To this aim, we have
Nicolas Valero   +6 more
doaj   +1 more source

Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation

open access: yesNanomaterials, 2022
This work is focused on the application of a laser-based technique, i.e., matrix-assisted pulsed laser evaporation (MAPLE) for the development of electrochemical sensors aimed at the detection of nitrites in water.
Cristina Craciun   +7 more
doaj   +1 more source

Single-shot measurement of the photonic band structure in a fiber-based Floquet-Bloch lattice

open access: yesCommunications Physics, 2021
Floquet-Bloch lattices are systems that are relatively difficult to implement in solid-state physics. Here, using a photonic lattice as an alternative, the authors experimentally observe Floquet-Bloch bands using a single-shot method which allows them to
Corentin Lechevalier   +5 more
doaj   +1 more source

Phase-sensitive seeded modulation instability in passive fiber resonators

open access: yesCommunications Physics, 2022
Modulation instability refers to the sensitivity of dispersive, weakly nonlinear systems to small perturbations and may be used as a source of optical gain.
Florent Bessin   +5 more
doaj   +1 more source

Hybrid Nanostructures Obtained by Transport and Condensation of Tungsten Oxide Vapours onto CNW Templates

open access: yesNanomaterials, 2021
We present hybrid nanomaterial architectures, consisting of carbon nanowalls (CNW) templates decorated with tungsten oxide nanoparticles, synthesized using a mechanism based on tungsten oxide sublimation, vapor transport, followed by vapor condensation ...
Lavinia Gabriela Carpen   +6 more
doaj   +1 more source

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

open access: yesJournal of Spectroscopy, 2022
We report a compositional analysis of four coal samples collected from different mines in Pakistan and one Chinese brand. The coal samples were pelletized in the form of a disc and irradiated with a focused laser beam of fundamental (1064 nm) and second (
Muhammad Aamir Israr   +3 more
doaj   +1 more source

Facile Fabrication of Hybrid Carbon Nanotube Sensors by Laser Direct Transfer

open access: yesNanomaterials, 2021
Ammonia is one of the most frequently produced chemicals in the world, and thus, reliable measurements of different NH3 concentrations are critical for a variety of industries, among which are the agricultural and healthcare sectors.
Anca F. Bonciu   +4 more
doaj   +1 more source

Probing the dispersive properties of optical fibers with an array of femtosecond-written fiber Bragg gratings

open access: yesScientific Reports, 2022
We propose an efficient method to determine the effective refractive index of step-index optical fibers from the visible to the mid-IR and thus allowing to infer their dispersive properties over a broad spectral range.
Tommy Boilard   +2 more
doaj   +1 more source

Rod Laser – The first laser was a rod laser [PDF]

open access: yesLaser Technik Journal, 2005
Laser technology is relatively young. The first laser was built in 1960 by Maiman at AT&T Labs in the USA. It was a rod-shaped ruby laser, this arrangement having been chosen for its favourable symmetry (Fig. 1). Starting from this device, the technology of solid-state lasers developed rapidly.
Hans Amler, Josef Thumbs
openaire   +2 more sources

Ultrafast Fiber Laser Emitting at 2.8 µm Based on a SESAM and a Broadband FBG

open access: yesPhotonics, 2023
Ultrafast mid-infrared fiber lasers have been intensely studied in the last decade for the generation of high harmonics, molecular spectroscopy, material processing and remote sensing.
Pascal Paradis   +4 more
doaj   +1 more source

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