Results 41 to 50 of about 306,939 (296)

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

Passively mode-locked semiconductor lasers and their applications [PDF]

open access: yes, 2008
In this paper we present some characterizations of passively mode-locked semiconductor lasers. These lasers are multimode and they exhibit a modulation of their output power even though they are DC-biased.
Frederic Surre   +5 more
core   +2 more sources

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

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

Ultrashort-pulse generation from quantum-dot semiconductor diode lasers [PDF]

open access: yes, 2008
In this thesis, novel regimes of mode locking in quantum dot semiconductor laser diodes have been investigated by exploiting the unique features offered by quantum dots.
Cataluna, Maria Ana
core   +2 more sources

Formation of Ordered Ionic Salt Agglomerates Through Evaporative Crystallization in Hanging Drop Systems

open access: yesApplied Sciences
This study introduces novel experimental systems that facilitate the nucleation, growth, aggregation, and agglomeration of ionic salt solutions, leading to structurally and functionally distinctive crystal formations.
Ion Sandu   +7 more
doaj   +1 more source

Discrete mode lasers for applications in access networks [PDF]

open access: yes, 2007
Fast development of the modern telecommunication networks such as fiber-to-the-home or radio-over-fiber systems require an inexpensive yet reliable optical transmitter for electro-optic conversion.
Kelly, Brian   +13 more
core   +2 more sources

Numerical simulation and design of semiconductor quantum dot-based lasers and amplifiers [PDF]

open access: yes, 2013
Numerical simulation and design of semiconductor quantum dot-based lasers and ...
Xu, Tianhong
core   +1 more source

Wide-bandwidth mode-hop-free tuning of extended-cavity GaN diode lasers [PDF]

open access: yes, 2005
We present a new approach for extended-cavity diode-laser tuning to achieve wide mode-hop-free tuning ranges. By using a multiple piezoactuated grating mount, the cavity length and grating angle in the laser can be adjusted independently, allowing mode ...
Burns, I.S., Kaminski, C.F., Hult, J.
core   +4 more sources

The piston Riemann problem in a photon superfluid

open access: yesNature Communications, 2022
The flow of light in nonlinear media can be considered as superfluid flow and described with quantum hydrodynamics. Here the authors demonstrate superfluid flow, optical rarefaction (retracting piston) and shock (pushing piston) wave pairs and ...
Abdelkrim Bendahmane   +5 more
doaj   +1 more source

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