Generation of high-energy single pulses and pulse clusters in ytterbium fibre lasers with quasi-synchronous modulation of the pump power

2021 ◽  
Vol 51 (12) ◽  
pp. 1061-1067
Author(s):  
Aleksey Vladimirovich Ivanenko ◽  
B N Nyushkov ◽  
Sergei Valer'evich Smirnov
Keyword(s):  
Pump Power ◽  
High Energy ◽  
Fibre Lasers

High-energy organic group-induced spectrally pure upconversion emission in novel zirconate-/hafnate-based nanocrystals

CrystEngComm ◽  
2015 ◽  
Vol 17 (37) ◽  
pp. 7169-7174 ◽  
Author(s):  
Xianghong He ◽  
Bing Yan
Keyword(s):  
Pump Power ◽  
Near Infrared ◽  
Incident Light ◽  
Upconversion Emission ◽  
High Energy ◽  
Single Band ◽  
Organic Group ◽  
Red Fluorescence

A series of novel fluoride-based nanophosphors (NPs) exhibiting spectrally pure upconversion (UC) red fluorescence upon near-infrared (980 nm) excitation. The single-band deep-red UC luminescence feature of K3MF7:Yb3+,Er3+ (M = Zr, Hf) NPs is independent of the doping levels of Yb3+–Er3+ and the pump power of incident light.

scholarly journals 1.3 µm dissipative soliton resonance generation in Bismuth doped fiber laser

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Ahmad ◽  
S. N. Aidit ◽  
S. I. Ooi ◽  
M. Z. Samion ◽  
S. Wang ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Pulse Energy ◽  
Signal To Noise Ratio ◽  
Maximum Output Power ◽  
High Energy ◽  
Gain Medium ◽  
Dissipative Soliton ◽  
Maximum Output ◽  
Soliton Resonance

AbstractIn this work, a Figure-9 (F9) bismuth-doped fiber laser (BiDFL) operating in the dissipative soliton resonance (DSR) regime is presented. The 1338 nm laser used a BiDF as the active gain medium, while a nonlinear amplifying loop mirror (NALM) in an F9 configuration was employed to obtain high energy mode-locked pulses. The wave breaking-free rectangular pulse widened significantly in the time domain with the increase of the pump power while maintaining an almost constant peak power of 0.6 W. At the maximum pump power, the mode-locked laser delivered a rectangular-shaped pulse with a duration of 48 ns, repetition rate of 362 kHz and a radio-frequency signal-to-noise ratio of more than 60 dB. The maximum output power was recorded at around 11 mW with a corresponding pulse energy of 30 nJ. This is, to the best of the author’s knowledge, the highest mode-locked pulse energy obtained at 1.3 μm as well as the demonstration of an NALM BiDFL in a F9 configuration.

High-power pump combiners for Tm-doped fibre lasers

2015 ◽  
Vol 23 (4) ◽  
Author(s):  
D. Stachowiak ◽  
P. Kaczmarek ◽  
K.M. Abramski
Keyword(s):  
Pump Power ◽  
Output Power ◽  
High Power ◽  
Fibre Laser ◽  
Power Combiner ◽  
Fibre Lasers ◽  
Transmission Level ◽  
Laser Setup

AbstractIn this paper our results of investigation on a pump power combiner in a configuration of 7×1 are presented. The performed combiner, with pump power of 80–85% transmission level, was successfully applied in a thulium doped fibre laser. The performed all-fibre laser setup reached a total CW output power of 6.42 W, achieving the efficiency on a 32.1% level.

Beam combining of high energy fibre lasers

2018 ◽  
Vol 47 (1) ◽  
pp. 103011
Author(s):  
程雪 Cheng Xue ◽  
王建立 Wang Jianli ◽  
刘昌华 Liu Changhua
Keyword(s):  
High Energy ◽  
Fibre Lasers ◽  
Beam Combining

scholarly journals Mode-Locked Fibre Lasers with High-Energy Pulses

10.5772/24360 ◽  
2011 ◽  
Author(s):  
S. V. Smirnov ◽  
S.M. Kobtsev ◽  
S. V. Kukarin ◽  
S. K. Turitsy
Keyword(s):  
High Energy ◽  
Fibre Lasers

Dynamic noise responses of DFB fibre lasers in presence of pump power fluctuations

1999 ◽  
Vol 35 (4) ◽  
pp. 299 ◽  
Author(s):  
Y. Qian ◽  
P. Varming ◽  
J.H. Povlsen ◽  
V.C. Lauridsen
Keyword(s):  
Pump Power ◽  
Fibre Lasers ◽  
Dynamic Noise ◽  
Power Fluctuations

New approach to mode locking of high-energy-pulse fibre lasers

2021 ◽  
Author(s):  
B. Nyushkov ◽  
A. Ivanenko ◽  
S. Smirnov ◽  
S. Kobtsev
Keyword(s):  
High Energy ◽  
Mode Locking ◽  
Fibre Lasers ◽  
New Approach ◽  
Energy Pulse

The E-ring: interactions with plasma and implications for its evolution

1984 ◽  
Vol 75 ◽  
pp. 599-602
Author(s):  
T.V. Johnson ◽  
G.E. Morfill ◽  
E. Grun
Keyword(s):  
Time Scale ◽  
Particle Density ◽  
High Energy ◽  
Particle Removal ◽  
Density Region ◽  
Drag Forces ◽  
Orbit Evolution ◽  
History Of ◽  
Ring Particle ◽  
Ring Material

A number of lines of evidence suggest that the particles making up the E-ring are small, on the order of a few microns or less in size (Terrile and Tokunaga, 1980, BAAS; Pang et al., 1982 Saturn meeting; Tucson, AZ). This suggests that a variety of electromagnetic and plasma affects may be important in considering the history of such particles. We have shown (Morfill et al., 1982, J. Geophys. Res., in press) that plasma drags forces from the corotating plasma will rapidly evolve E-ring particle orbits to increasing distance from Saturn until a point is reached where radiation drag forces acting to decrease orbital radius balance this outward acceleration. This occurs at approximately Rhea's orbit, although the exact value is subject to many uncertainties. The time scale for plasma drag to move particles from Enceladus' orbit to the outer E-ring is ~104yr. A variety of effects also act to remove particles, primarily sputtering by both high energy charged particles (Cheng et al., 1982, J. Geophys. Res., in press) and corotating plasma (Morfill et al., 1982). The time scale for sputtering away one micron particles is also short, 102 - 10 yrs. Thus the detailed particle density profile in the E-ring is set by a competition between orbit evolution and particle removal. The high density region near Enceladus' orbit may result from the sputtering yeild of corotating ions being less than unity at this radius (e.g. Eviatar et al., 1982, Saturn meeting). In any case, an active source of E-ring material is required if the feature is not very ephemeral - Enceladus itself, with its geologically recent surface, appears still to be the best candidate for the ultimate source of E-ring material.

Analysis of electron-diffraction intensity profiles using a photodiode-array detection system

1983 ◽  
Vol 41 ◽  
pp. 322-323
Author(s):  
J. B. Warren
Keyword(s):  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Detection System ◽  
High Energy ◽  
Photographic Emulsion ◽  
Diffraction Intensity ◽  
Silicon Photodiode ◽  
Photodiode Array Detection ◽  
Analog To Digital ◽  
Photodiode Array

Electron diffraction intensity profiles have been used extensively in studies of polycrystalline and amorphous thin films. In previous work, diffraction intensity profiles were quantitized either by mechanically scanning the photographic emulsion with a densitometer or by using deflection coils to scan the diffraction pattern over a stationary detector. Such methods tend to be slow, and the intensities must still be converted from analog to digital form for quantitative analysis. The Instrumentation Division at Brookhaven has designed and constructed a electron diffractometer, based on a silicon photodiode array, that overcomes these disadvantages. The instrument is compact (Fig. 1), can be used with any unmodified electron microscope, and acquires the data in a form immediately accessible by microcomputer.Major components include a RETICON 1024 element photodiode array for the de tector, an Analog Devices MAS-1202 analog digital converter and a Digital Equipment LSI 11/2 microcomputer. The photodiode array cannot detect high energy electrons without damage so an f/1.4 lens is used to focus the phosphor screen image of the diffraction pattern on to the photodiode array.

Observation of Superlattice Dislocations on Cube Planes in Ni3Al

1973 ◽  
Vol 31 ◽  
pp. 174-175 ◽  
Author(s):  
J. M. Oblak ◽  
W. H. Rand
Keyword(s):  
Nearest Neighbor ◽  
Antiphase Boundary ◽  
Nearest Neighbors ◽  
High Energy ◽  
Cross Slip ◽  
Octahedral Plane ◽  
Trapping Mechanism ◽  
Slip Traces

The energy of an a/2 <110> shear antiphase. boundary in the Ll2 expected to be at a minimum on {100} cube planes because here strue ture is there is no violation of nearest-neighbor order. The latter however does involve the disruption of second nearest neighbors. It has been suggested that cross slip of paired a/2 <110> dislocations from octahedral onto cube planes is an important dislocation trapping mechanism in Ni3Al; furthermore, slip traces consistent with cube slip are observed above 920°K.Due to the high energy of the {111} antiphase boundary (> 200 mJ/m2), paired a/2 <110> dislocations are tightly constricted on the octahedral plane and cannot be individually resolved.

Sign in / Sign up

Export Citation Format

Share Document