Measurements of the third- and fifth-order optical nonlinearities of water at 532 and 1064  nm using the D4σ method

The linearization effects on two-way Doherty amplifiers are presented in this paper. Symmetrical Doherty amplifier with the additional circuit for linearization has been realized and measurements of the linearization influence on the third- and fifth-order intermodulation products have been carried out. Asymmetrical Doherty amplifier has been designed and effects of the applied linearization technique have been considered through the simulation process. The linearization approach uses the fundamental signals? second harmonics and fourth-order nonlinear signals that are extracted at the output of the peaking cell, adjusted in amplitude and phase and injected at the input and output of the carrier cell in Doherty amplifier.

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Demonstration of Transmission Mode Soft X-ray NEXAFS Using Third- and Fifth-Order Harmonics of FEL Radiation at SACLA BL1

Applied Sciences ◽

10.3390/app10217852 ◽

2020 ◽

Vol 10 (21) ◽

pp. 7852

Author(s):

Hiroshi Iwayama ◽

Masanari Nagasaka ◽

Ichiro Inoue ◽

Shigeki Owada ◽

Makina Yabashi ◽

...

Keyword(s):

Fine Structure ◽

Free Electron ◽

Free Electron Laser ◽

Transmission Mode ◽

Pump Probe ◽

X Ray ◽

The Third ◽

Nexafs Spectroscopy ◽

Fifth Order ◽

X Ray Absorption

We demonstrate the applicability of third- and fifth-order harmonics of free-electron laser (FEL) radiation for soft X-ray absorption spectroscopy in the transmission mode at SACLA BL1, which covers a photon energy range of 20 to 150 eV in the fundamental FEL radiation. By using the third- and fifth-order harmonics of the FEL radiation, we successfully recorded near-edge X-ray absorption fine structure (NEXAFS) spectra for Ar 2p core ionization and CO2 C 1s and O 1s core ionizations. Our results show that the utilization of third- and fifth-order harmonics can significantly extend the available photon energies for NEXAFS spectroscopy using an FEL and opens the door to femtosecond pump-probe NEXAFS using a soft X-ray FEL.

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The third-order optical nonlinearities of thiophene-bearing phthalocyanines studied by Z-scan technique

Journal of Photochemistry and Photobiology A Chemistry ◽

10.1016/j.jphotochem.2010.12.004 ◽

2011 ◽

Vol 218 (1) ◽

pp. 64-68 ◽

Cited By ~ 17

Author(s):

Zihui Chen ◽

Xinyu Zhou ◽

Zhongyu Li ◽

Lihong Niu ◽

Jiaxiang Yi ◽

...

Keyword(s):

Optical Nonlinearities ◽

Third Order ◽

The Third

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Semi Implicit Hybrid Methods with Higher Order Dispersion for Solving Oscillatory Problems

Abstract and Applied Analysis ◽

10.1155/2013/136961 ◽

2013 ◽

Vol 2013 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

S. Z. Ahmad ◽

F. Ismail ◽

N. Senu ◽

M. Suleiman

Keyword(s):

Fourth Order ◽

Absolute Stability ◽

Hybrid Methods ◽

Order Method ◽

The Third ◽

Dispersion Order ◽

Runge Kutta ◽

Fifth Order ◽

Higher Order Dispersion ◽

Order Dispersion

We constructed three two-step semi-implicit hybrid methods (SIHMs) for solving oscillatory second order ordinary differential equations (ODEs). The first two methods are three-stage fourth-order and three-stage fifth-order with dispersion order six and zero dissipation. The third is a four-stage fifth-order method with dispersion order eight and dissipation order five. Numerical results show that SIHMs are more accurate as compared to the existing hybrid methods, Runge-Kutta Nyström (RKN) and Runge-Kutta (RK) methods of the same order and Diagonally Implicit Runge-Kutta Nyström (DIRKN) method of the same stage. The intervals of absolute stability or periodicity of SIHM for ODE are also presented.

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Studies of the Third and Fifth Order NonLinear Susceptibilities of Optical Materials using Femtosecond Transient Absorption Spectroscopy

Ultrafast Phenomena XII - Springer Series in Chemical Physics ◽

10.1007/978-3-642-56546-5_161 ◽

2001 ◽

pp. 548-550

Author(s):

Katrin Ekvall ◽

Cecilia Lundevall ◽

Peter van der Meulen

Keyword(s):

Absorption Spectroscopy ◽

Optical Materials ◽

Transient Absorption ◽

Transient Absorption Spectroscopy ◽

The Third ◽

Femtosecond Transient Absorption ◽

Femtosecond Transient Absorption Spectroscopy ◽

Fifth Order

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An Optimized Symmetric WENO Method-Based Numerical Simulation of Intense Sound Field Generated by Underwater Plasma Sound Source

Journal of Sensors ◽

10.1155/2018/4873950 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Kaizhuo Lei ◽

Xiaolong Liu ◽

Ning Li ◽

Xuchao Fan

Keyword(s):

Euler Equations ◽

Sound Source ◽

Sound Field ◽

Maximum Error ◽

Numerical Examples ◽

Weighted Essentially Nonoscillatory ◽

The Third ◽

Calculation Results ◽

Pulse Sound ◽

Fifth Order

The intensive pulse sound wave can be generated by the underwater plasma sound source (UPSS) based on the discharge of the underwater high voltage. The distribution of the sound field is prominently nonlinear. In this paper, the sound field of the intensive UPSS is described by the integral two-dimensional axisymmetric unsteady Euler equations firstly. In order to solve the Euler equations numerically, an optimized fifth-order symmetric WENO (weighted essentially nonoscillatory) method based on the three templates is proposed which is called WENO-SYM3. Without increasing the number of candidate templates, a new symmetric template structure can be obtained by expanding the second template and shifting the third one backwards for one space. The method is validated through numerical examples and experiments, and the results show that WENO-SYM3 has a high distinguished accuracy; meanwhile, its nonphysical oscillations are not obvious. The experimental results are basically the same as the calculation results, and the maximum error is around 3%.

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