A5028629827- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Nonlinear Optical Materials Studies
- Solid State Laser Technologies
- Nonlinear Optical Materials Research
- Photochemistry and Electron Transfer Studies
- Laser-Plasma Interactions and Diagnostics
- Titanium Alloys Microstructure and Properties
- Laser-Ablation Synthesis of Nanoparticles
- Metal and Thin Film Mechanics
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Advanced materials and composites
- Welding Techniques and Residual Stresses
- Laser Design and Applications
- Porphyrin and Phthalocyanine Chemistry
- Photochromic and Fluorescence Chemistry
- Chalcogenide Semiconductor Thin Films
- Laser-induced spectroscopy and plasma
- Photorefractive and Nonlinear Optics
University of Babylon
2018-2024
Queen's University Belfast
2016
We have investigated the temporal intensity contrast characteristics from a broad range of mode-locked short-pulse oscillators used for seeding high-power terawatt and petawatt-class laser systems. Saturable absorber (SESAM), Kerr lens (KLM), nonlinear polarization evolution (NPE) in optical fibers synchronously pumped parametric oscillator (OPO) sources been measured using third-order autocorrelator with up to 1010 dynamic range. restricted characterization features <30 ps about pulse that...
The temporal contrast of a regeneratively amplified, sub-picosecond pulse is enhanced by employing low-gain optical parametric amplification stage self-pumped the second harmonic pulse. Through careful characterization two related nonlinear processes and optimization non-collinear geometry, robust high-contrast idler has been generated, with excellent spatial quality in both near far field. overall energy conversion efficiency exceeds 14%, 33% intensity efficiency. cleaning implemented...
Abstract The current study investigates the effects of solvent on linear absorption and nonlinear refraction n 2 Methyl orange dye at different spectral regions. shows that depend excitation wavelength. peak value absorbance is similar in water ethanol. However, properties lead to shift curve short wavelengths side. At located outside resonance band, dissolved ethanol almost identical response. This response lower than wavelength within band. behaviour where maximum (405 nm) decreases longer...
We present a comprehensive model for predicting the full performance of second harmonic generation-optical parametric amplification system that aims at enhancing temporal contrast laser pulses. The simultaneously takes into account all main parameters play in such as group velocity mismatch, beam divergence, spectral content, pump depletion, and length nonlinear crystals. monitor influence initial input pulse interdependence two related non-linear processes on show its optimum configuration....
This work presents the synthesis and characterization of Homophase CdS Heterophase Fe/CdS nanoparticles prepared by pulsed laser ablation (PLA) in water methanol using nanosecond duration Nd:YAG laser. The morphology, crystalline state, structure products were examined performing SEM, XRD, FTIR measurements, respectively. results showed transformation phase changing clustering size when PLA water. Heterojunctions obtained both liquids. presence Fe nanoparticle imposed another significantly...
We present a new phase characterization technique for ultrashort laser pulses that employs self-phase modulation in the dispersion scan approach.The method can be implemented by recording set of non-linearly modulated spectra generated with known chirp values.The unknown pulse is retrieved linking recorded to initial spectrum via function guessed minimization iterative algorithm.This has many advantages over techniques use frequency conversion processes.Mainly, cancels out and group velocity...
In the present study, linear optical properties and nonlinear refraction of Methylene blue (MB) dye have been studied over almost whole visible range in two polar solvents. The characterization includes investigating influence solvent molecules on absorption solute. nonlinearity solutions is examined by z-scan technique with CW exciting lasers that having four different wavelengths (405, 473, 532, 650 nm). results study show MB has maximum at wavelength nm both solvents (-0.612 -0.302 cm2/MW...
The optical properties, linear and nonlinear, for Leishman stain are studied in ethanol chloroform over a wide spectral region. consists of two components: Methylene blue (MB) Eosin (E). low intensity measurements, regime, show the absorption emission characteristics E MB components only component chloroform. Under influence less than 15[Formula: see text]MW/m 2 , shows nonlinear at excitation wavelengths 532[Formula: text]nm 650[Formula: only. coefficients solutions 1–12.4 [Formula:...
Abstract In this study, the linear properties and nonlinear refraction of Bromocresol purple (BCP) dye are studied in water ethanol at three different wavelengths (405, 473 532 nm). The study is to assess effect solvent on optical characteristics wavelengths. Beside differences response, refractive index n 2 changes by changing solvent. type solvent-induced change depends excitation wavelength. addition, value same wavelength light. two solvents not likely be due absorption or thermal...
We present a comprehensive model for predicting the full performance of second harmonic generationoptical parametric amplification system that aims at enhancing temporal contrast laser pulses. The simultaneously takes into account all main parameters play in such as group velocity mismatch, beam divergence, spectral content, pump depletion, and length nonlinear crystals. monitor influence initial input pulse interdependence two related non-linear processes on show its optimum configuration....