Order of magnitude repetition rate multiplication in FM modelocked fibre laser by higher-order FM sideband generation and filtering

1998 ◽  
Vol 34 (13) ◽  
pp. 1321 ◽  
Author(s):  
K.S. Abedin ◽  
N. Onodera ◽  
M. Hyodo
Keyword(s):  
Repetition Rate ◽  
Higher Order ◽  
Fibre Laser ◽  
Order Of Magnitude ◽  
Sideband Generation

Pulse repetition rate multiplication in fibre laser using higher-order passive modelocking

2008 ◽  
Vol 44 (21) ◽  
pp. 1240 ◽  
Author(s):  
T. Sylvestre ◽  
J. Schroeder ◽  
S. Coen ◽  
Ph. Emplit ◽  
M. Haelterman
Keyword(s):  
Repetition Rate ◽  
Pulse Repetition Rate ◽  
Higher Order ◽  
Pulse Repetition ◽  
Fibre Laser

Efficient and High-Quality Seeded Graph Matching: Employing Higher-order Structural Information

2021 ◽  
Vol 15 (3) ◽  
pp. 1-31
Author(s):  
Haida Zhang ◽  
Zengfeng Huang ◽  
Xuemin Lin ◽  
Zhe Lin ◽  
Wenjie Zhang ◽  
...  
Keyword(s):  
Large Scale ◽  
Graph Matching ◽  
Structural Information ◽  
Experimental Studies ◽  
Higher Order ◽  
Personalized Pagerank ◽  
Matching Accuracy ◽  
Approximation Techniques ◽  
Order Of Magnitude ◽  
Matching Score

Driven by many real applications, we study the problem of seeded graph matching. Given two graphs and , and a small set of pre-matched node pairs where and , the problem is to identify a matching between and growing from , such that each pair in the matching corresponds to the same underlying entity. Recent studies on efficient and effective seeded graph matching have drawn a great deal of attention and many popular methods are largely based on exploring the similarity between local structures to identify matching pairs. While these recent techniques work provably well on random graphs, their accuracy is low over many real networks. In this work, we propose to utilize higher-order neighboring information to improve the matching accuracy and efficiency. As a result, a new framework of seeded graph matching is proposed, which employs Personalized PageRank (PPR) to quantify the matching score of each node pair. To further boost the matching accuracy, we propose a novel postponing strategy, which postpones the selection of pairs that have competitors with similar matching scores. We show that the postpone strategy indeed significantly improves the matching accuracy. To improve the scalability of matching large graphs, we also propose efficient approximation techniques based on algorithms for computing PPR heavy hitters. Our comprehensive experimental studies on large-scale real datasets demonstrate that, compared with state-of-the-art approaches, our framework not only increases the precision and recall both by a significant margin but also achieves speed-up up to more than one order of magnitude.

scholarly journals Selective etching of 10 MHz repetition rate fs-laser inscribed tracks in YAG

2021 ◽  
Vol 255 ◽  
pp. 10003
Author(s):  
Kore Hasse ◽  
Detlef Kip ◽  
Christian Kränkel
Keyword(s):  
Aspect Ratio ◽  
Repetition Rate ◽  
Laser System ◽  
Selective Etching ◽  
Etching Process ◽  
Acid Mixture ◽  
Laser Structuring ◽  
Order Of Magnitude ◽  
Fs Laser

We investigated fs-laser structuring of YAG crystals at high writing velocities up to 100 mm/s using a commercial 10 MHz fs-laser system supplied by Coherent Inc. and selective etching of these structures for fabrication of ultrahigh aspect ratio microchannels. Usage of a diluted acid mixture of 22% H3PO4 and 24% H2SO4 accelerated the etching process significantly to an etching parameter D of 11.2 μm2/s, which is three times higher than previously reported. Additionally, the selectivity of the etching process was increased by an order of magnitude.

scholarly journals High-power, high repetition-rate, ultrafast fibre laser based source of DUV radiation at 266 nm

OSA Continuum ◽  
2018 ◽  
Vol 2 (1) ◽  
pp. 99 ◽  
Author(s):  
A. Srinivasa Rao ◽  
N. Apurv Chaitanya ◽  
G. K. Samanta
Keyword(s):  
High Power ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
Fibre Laser ◽  
High Repetition

scholarly journals In situ photoacoustic measurement of soot profiles in laminar flames using a high-repetition-rate pulsed fibre laser

2019 ◽  
Vol 125 (4) ◽  
Author(s):  
Gordon S. Humphries ◽  
Robert Roy ◽  
John D. Black ◽  
Michael Lengden ◽  
Iain S. Burns
Keyword(s):  
Repetition Rate ◽  
High Repetition Rate ◽  
Laminar Flames ◽  
Fibre Laser ◽  
High Repetition ◽  
Photoacoustic Measurement

scholarly journals Different Effects of Cisplatin and Transplatin on the Higher-Order Structure of DNA and Gene Expression

2019 ◽  
Vol 21 (1) ◽  
pp. 34 ◽  
Author(s):  
Toshifumi Kishimoto ◽  
Yuko Yoshikawa ◽  
Kenichi Yoshikawa ◽  
Seiji Komeda
Keyword(s):  
Gene Expression ◽  
Nuclear Dna ◽  
Biological Effects ◽  
Inhibitory Effect ◽  
Higher Order ◽  
Luciferase Assay ◽  
Order Structure ◽  
Force Microscopy ◽  
Order Of Magnitude

Despite the effectiveness of cisplatin as an anticancer agent, its trans-isomer, transplatin, is clinically ineffective. Although both isomers target nuclear DNA, there is a large difference in the magnitude of their biological effects. Here, we compared their effects on gene expression in an in vitro luciferase assay and quantified their effects on the higher-order structure of DNA using fluorescence microscopy (FM) and atomic force microscopy (AFM). The inhibitory effect of cisplatin on gene expression was about 7 times that of transplatin. Analysis of the fluctuation autocorrelation function of the intrachain Brownian motion of individual DNA molecules showed that cisplatin increases the spring and damping constants of DNA by one order of magnitude and these visco-elastic characteristics tend to increase gradually over several hours. Transplatin had a weaker effect, which tended to decrease with time. These results agree with a stronger inhibitory effect of cisplatin on gene expression. We discussed the characteristic effects of the two compounds on the higher-order DNA structure and gene expression in terms of the differences in their binding to DNA.

scholarly journals Bias-Variance Trade-Off in Hierarchical Probabilistic Models Using Higher-Order Feature Interactions

2019 ◽  
Vol 33 ◽  
pp. 4488-4495 ◽  
Author(s):  
Simon Luo ◽  
Mahito Sugiyama
Keyword(s):  
Probabilistic Models ◽  
Classical Problem ◽  
Higher Order ◽  
Boltzmann Machine ◽  
Trade Off ◽  
Feature Interactions ◽  
Order Of Magnitude ◽  
Bias Variance ◽  
Log Linear ◽  
High Representation

Hierarchical probabilistic models are able to use a large number of parameters to create a model with a high representation power. However, it is well known that increasing the number of parameters also increases the complexity of the model which leads to a bias-variance trade-off. Although it is a classical problem, the bias-variance trade-off between hiddenlayers and higher-order interactions have not been well studied. In our study, we propose an efficient inference algorithm for the log-linear formulation of the higher-order Boltzmann machine using a combination of Gibbs sampling and annealed importance sampling. We then perform a bias-variance decomposition to study the differences in hidden layers and higher-order interactions. Our results have shown that using hidden layers and higher-order interactions have a comparable error with a similar order of magnitude and using higherorder interactions produce less variance for smaller sample size.

Higher-order Femtosecond Solitons Generation in a Hybrid Mode-locked Tm-doped Fibre Laser

2014 ◽  
Author(s):  
Maria A. Chernysheva ◽  
Alexander A. Krylov ◽  
Chengbo Mou ◽  
Raz N. Arif ◽  
Alex Rozhin ◽  
...  
Keyword(s):  
Higher Order ◽  
Fibre Laser ◽  
Hybrid Mode

Repetition rate multiplication in figure-eight fibre laser with 3dB couplers

2007 ◽  
Vol 277 (2) ◽  
pp. 411-413 ◽  
Author(s):  
Seong-sik Min ◽  
Yucheng Zhao ◽  
Simon Fleming
Keyword(s):  
Repetition Rate ◽  
Fibre Laser

scholarly journals Effect of ionospheric depth on the ionospheric feedback instability: cutoff and subsequent <I>E</I><sub>||</sub> modes

2010 ◽  
Vol 28 (9) ◽  
pp. 1777-1794 ◽  
Author(s):  
R. Cosgrove ◽  
R. Doe
Keyword(s):  
Growth Rate ◽  
Electric Fields ◽  
Finite Thickness ◽  
Higher Order ◽  
Plasma Structure ◽  
Higher Order Modes ◽  
Order Of Magnitude ◽  
E Region ◽  
The One ◽  
Two Fluid

Abstract. The ionospheric feedback instability (IFI), which involves feedback between ionospheric modifications and waves reflected off the magnetosphere, has up to this point been analyzed in terms of field line integrated (FLI) ionospheric quantities, that is, with the assumption that the ionospheric thickness can be ignored. In this work we test this assumption by solving the two-fluid equations for a representative ionospheric slab of finite thickness. We find that the results are for the most part incompatible with a description in terms of FLI quantities, and that their use can easily lead to an order of magnitude overestimation of the growth rate. This occurs because the first eigenmode, which is the one compatible with an FLI description, is cutoff above a certain frequency, leaving only higher order modes with wavelengths along B that are subsumed by the slab. Taking the results at face value, the parallel electric fields associated with the higher order modes are a possible contributor to electron heating and plasma structure in the E-region ionosphere.

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