Results 11 to 20 of about 1,205,027 (295)

Pulsed laser deposition and characterisation of rare earth doped glass-polymer optical materials [PDF]

open access: yes, 2012
Tellurite glass is well known for its excellent optical properties in the application of optical fiber and planar waveguide devices, particularly for optical amplifiers. This thesis is focused on the design, fabrication and characterisation of tellurite
Zhao, Zhanxiang
core   +6 more sources

Intermodulation distortion performance enhancement of microwave power amplifiers [PDF]

open access: yes, 2000
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This thesis reports the author's investigation of the effects of the injection of specific signals on the intermodulation distortion performance of ...
Mbabele, M., Mbabele, Modeste
core   +7 more sources

Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]

open access: yes, 2012
In laser cutting of thick steel sheets, quality difference is observed between cut surfaces obtained with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro   +3 more
core   +1 more source

Tunable 60 GHz Multiwavelength Brillouin Erbium Fiber Laser

open access: yesApplied Sciences, 2023
An experimental study of a tunable 60 GHz multiwavelength Brillouin erbium fiber laser is presented in this paper. Two unidirectional ring laser cavities and two pre-amplification laser cavities are used.
Mohammed K. Awsaj   +6 more
doaj   +1 more source

Diode-Pumped High Energy and High Average Power All-Solid-State Picosecond Amplifier Systems

open access: yesApplied Sciences, 2015
We present our research on the high energy picosecond laser operating at a repetition rate of 1 kHz and the high average power picosecond laser running at 100 kHz based on bulk Nd-doped crystals.
Jiaxing Liu   +5 more
doaj   +1 more source

Hybrid Nd:YAG/Nd:LuAG Nanosecond Laser Oscillator and Amplifier

open access: yesFrontiers in Physics, 2022
We demonstrate an active mirror Q-switched laser with Nd:YAG/Nd:LuAG hybrid gain media, achieving a laser output of 1 J, 10 Hz, 8 ns. Using this hybrid oscillator as well as Nd:YAG and Nd:LuAG amplifiers, the difference in extraction efficiency of hybrid
Xinxing Lei   +5 more
doaj   +1 more source

Photonic crystal fiber amplifiers for high power ultrafast fiber lasers

open access: yesNanophotonics, 2013
In recent years, ultrafast laser systems using large-mode-area fiber amplifiers delivering several hundreds of watts of average power has attracted significant academic and industrial interest.
Alkeskjold Thomas T.   +8 more
doaj   +1 more source

Ultrashort-pulse, terawatt, long-wave infrared lasers based on high-pressure CO2 amplifiers [PDF]

open access: yesEPJ Web of Conferences, 2021
We discuss the state of the art, the ongoing research and development, and the potential for achieving a supra-terawatt peak power in few-cycle pulses at a long-wave infrared wavelength with a laser system based on high-pressure, mixed-isotope CO2 ...
Polyanskiy Mikhail N.   +4 more
doaj   +1 more source

Narrow-Linewidth 2 μm All-Fiber Laser Amplifier with a Highly Stable and Precisely Tunable Wavelength for Gas Molecule Absorption in Photonic Crystal Hollow-Core Fibers

open access: yesMolecules, 2021
In recent years, mid-infrared fiber lasers based on gas-filled photonic crystal hollow-core fibers (HCFs) have attracted enormous attention. They provide a potential method for the generation of high-power mid-infrared emissions, particularly beyond 4 μm.
Wenxi Pei   +5 more
doaj   +1 more source

Wavelength Scaling of Laser Wakefield Acceleration for the EuPRAXIA Design Point

open access: yesInstruments, 2019
Scaling the particle beam luminosity from laser wakefield accelerators to meet the needs of the physics community requires a significant, thousand-fold increase in the average power of the driving lasers.
Craig W. Siders   +7 more
doaj   +1 more source

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