Study the effect of fundamental and second harmonic wavelength on plasma parameters of emission magnesium lines in Nd: YAG laser

2022 ◽  
Author(s):  
Raghad S. Mohammed ◽  
Kadhim A. Aadim ◽  
Khalid A. Ahmed
Keyword(s):  
Second Harmonic ◽  
Plasma Parameters ◽  
Yag Laser

scholarly journals Optical Emission Spectroscopic Analysis of Plasma Parameters in Cadmium by Nd: YAG laser Technique

2021 ◽  
Vol 2114 (1) ◽  
pp. 012049
Author(s):  
Uday H. Tawfeeq ◽  
Ahmed K. Abbas ◽  
Kadhim A. Aadim
Keyword(s):  
Laser Pulse ◽  
Atmospheric Pressure ◽  
Spectroscopic Analysis ◽  
Debye Length ◽  
Optical Emission ◽  
Plasma Electron ◽  
Laser Technique ◽  
Plasma Parameters ◽  
Yag Laser ◽  
Emission Spectroscopic Analysis

Abstract In this work, optical emission spectroscopy (OES) was used to estimate the parameters of plasma electron temperature (Te), electron density (ne), plasma frequency (fp), Debye length (λD), and Debye number (ND). Understanding how an energy pulsed laser affects these variables is also important. Irradiation of pure cadmium using an Nd: YAG laser pulse with a wavelength(1064)nm and energy ranging from (200-600)millijoules, of frequency (6) Hz. The spectrum of laser-induced plasma was detected under atmospheric pressure. It was discovered that when the energy of the laser pulse rises, the intensity of the CdI and CdII lines increases.

Measurements of iron plasma parameters produced by a 1064 nm pulsed Nd: YAG laser

2013 ◽  
Vol 25 (7) ◽  
pp. 1690-1696 ◽  
Author(s):  
罗文峰 Luo Wenfeng ◽  
赵小侠 Zhao Xiaoxia ◽  
朱海燕 Zhu Haiyan ◽  
李冬冬 Li Dongdong ◽  
李晓莉 Li Xiaoli
Keyword(s):  
Plasma Parameters ◽  
Yag Laser

Plasma parameters of Au Nano-particles ablated on porous Silicon produced via Nd-YAG laser at 355 nm for sensing NH3 gas

Optik ◽  
2021 ◽  
pp. 168260
Author(s):  
Ala F. Ahmed ◽  
Mohammed R. Abdulameer ◽  
Murad M. Kadhim ◽  
Falah A-H. Mutlak
Keyword(s):  
Porous Silicon ◽  
Nano Particles ◽  
Plasma Parameters ◽  
Yag Laser ◽  
Au Nano Particles

scholarly journals Multimodal Nonlinear Microscopy for Therapy Monitoring of Cold Atmospheric Plasma Treatment

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 564 ◽  
Author(s):  
Tobias Meyer ◽  
Hyeonsoo Bae ◽  
Sybille Hasse ◽  
Jörn Winter ◽  
Thomas von Woedtke ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Therapy Monitoring ◽  
Spectroscopic Method ◽  
Atmospheric Plasma ◽  
Quality Level ◽  
Fluorescence Lifetime Imaging ◽  
Plasma Parameters ◽  
Cold Atmospheric Plasma ◽  
Label Free Detection ◽  
Induced Changes

Here we report on a non-linear spectroscopic method for visualization of cold atmospheric plasma (CAP)-induced changes in tissue for reaching a new quality level of CAP application in medicine via online monitoring of wound or cancer treatment. A combination of coherent anti-Stokes Raman scattering (CARS), two-photon fluorescence lifetime imaging (2P-FLIM) and second harmonic generation (SHG) microscopy has been used for non-invasive and label-free detection of CAP-induced changes on human skin and mucosa samples. By correlation with histochemical staining, the observed local increase in fluorescence could be assigned to melanin. CARS and SHG prove the integrity of the tissue structure, visualize tissue morphology and composition. The influence of plasma effects by variation of plasma parameters e.g., duration of treatment, gas composition and plasma source has been evaluated. Overall quantitative spectroscopic markers could be identified for a direct monitoring of CAP-treated tissue areas, which is very important for translating CAPs into clinical routine.

Fabrication of Optical Waveguide in Glass by Laser-Induced Crystallization

2006 ◽  
Vol 11-12 ◽  
pp. 197-200 ◽  
Author(s):  
R. Ihara ◽  
Yasuhiko Benino ◽  
Takumi Fujiwara ◽  
Takayuki Komatsu
Keyword(s):  
Optical Waveguides ◽  
Laser Scanning ◽  
Second Harmonic ◽  
Line Length ◽  
Yag Laser ◽  
Homogeneous Crystal ◽  
Scattering Spectra ◽  
Raman Scattering Spectra ◽  
Scattering Losses ◽  
Bending Angles

Homogeneous crystal lines were fabricated at the surface of 8Sm2O3.37Bi2O3.55B2O3 glass by irradiations of cw Nd: YAG laser (λ=1064 nm) with laser powers of 0.7-0.9 W and laser scanning speeds of 3-5 μm/s. It was confirmed from micro-Raman scattering spectra that the lines consist of nonlinear optical SmxBi1-xBO3 crystals showing second harmonic generations. The curved crystal lines with bending angles of 0∼90° were successfully written by just changing laser scanning directions. The light (λ=632.8 nm) transmission was confirmed for a crystal line (length: 850 μm) with two bending angles of ±30o, where significant light scattering losses were not observed at the bending points. We propose that the curved crystal lines written by YAG laser irradiations have a high potential for applications in optical waveguides.

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