The effect of laser power on the formation of carbon nanotubes prepared in CO2 continuous wave laser ablation at room temperature

Continuous wave laser irradiation of fullerene–nitroxide derivatives at room temperature leads to spin polarization and NMR signal enhancement of toluene solvent protons.

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Histological difference between pulsed wave laser and continuous wave laser in endovenous laser ablation

Phlebology The Journal of Venous Disease ◽

10.1177/0268355514538248 ◽

2014 ◽

Vol 30 (6) ◽

pp. 429-434 ◽

Cited By ~ 6

Author(s):

Rei Kansaku ◽

Naoki Sakakibara ◽

Atsushi Amano ◽

Hisako Endo ◽

Takashi Shimabukuro ◽

...

Keyword(s):

Laser Ablation ◽

Energy Density ◽

Continuous Wave ◽

Short Pulse ◽

Thermal Relaxation ◽

Continuous Wave Laser ◽

Invasive Treatment ◽

Vein Wall ◽

Endovenous Laser Ablation ◽

Wave Laser

Background Endovenous laser ablation to saphenous veins has been popular as a minimally invasive treatment for chronic venous insufficiency. However, adverse effects after endovenous laser ablation using continuous wave laser still remain. Pulsed wave with enough short pulse duration and sufficiently long thermal relaxation time may avoid the excess energy delivery, which leads to the perforation of the vein wall. Method (1) Free radiation: Laser is radiated in blood for 10 s. (2) Endovenous laser ablation: Veins were filled with blood and placed in saline. Endovenous laser ablations were performed. Results (1) There were clots on the fiber tips with continuous wave laser while no clots with pulsed wave laser. (2) In 980-nm continuous wave, four of 15 specimens had ulcers and 11 of 15 had perforation. In 1470-nm continuous wave with 120 J/cm of linear endovenous energy density, two of three presented ulcers and one of three showed perforation. In 1470-nm continuous wave with 60 J/cm of linear endovenous energy density, two of four had ulcers and two of four had perforation. In 1320-nm pulsed wave, there were neither ulcers nor perforation in the specimens. Conclusions While endovenous laser ablation using continuous wave results in perforation in many cases, pulsed wave does not lead to perforation.

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Mechanical erosion effect of continuous-wave laser ablation of GFRP under subsonic airflow

Sixth Symposium on Novel Optoelectronic Detection Technology and Applications ◽

10.1117/12.2564705 ◽

2020 ◽

Author(s):

Shancheng Xu ◽

Pengyu Nan ◽

Zhonghua Shen ◽

Zewen Li ◽

Bing Han ◽

...

Keyword(s):

Laser Ablation ◽

Continuous Wave ◽

Continuous Wave Laser ◽

Erosion Effect ◽

Mechanical Erosion ◽

Wave Laser

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Influence of gold nanolayer coating on the continuous-wave laser ablation of a pure aluminum surface: Evaluations of structural and optical features

Thin Solid Films ◽

10.1016/j.tsf.2019.01.021 ◽

2019 ◽

Vol 672 ◽

pp. 126-132 ◽

Cited By ~ 3

Author(s):

Mohammad Jafari Eskandari ◽

Ali Shafyei ◽

Sepehr Razi ◽

Reza Shoja Razavi

Keyword(s):

Laser Ablation ◽

Continuous Wave ◽

Pure Aluminum ◽

Aluminum Surface ◽

Continuous Wave Laser ◽

Wave Laser

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Optical Spectra Properties and Continuous-Wave Laser Performance of Tm,Y:CaF2 Single Crystals

International Journal of Optics ◽

10.1155/2018/8592359 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 2

Author(s):

Jingxin Ding ◽

Beibei Zhao ◽

Weiwei Ma ◽

Hao Yu ◽

Xiaobo Qian ◽

...

Keyword(s):

Cross Section ◽

Local Structure ◽

Room Temperature ◽

Continuous Wave ◽

Spectroscopic Properties ◽

Diode Pumping ◽

Continuous Wave Laser ◽

Vertical Bridgman ◽

Spectra Properties ◽

Wave Laser

3 at.% Tm, x at.% Y:CaF2 crystals (x=0, 0.5, 1, 2, and 3) were grown by the vertical Bridgman method and investigated. Codoping Y3+ ions can manipulate the local structure of Tm3+ ions in the CaF2 crystal and then improve the spectroscopic properties. Compared with 3 at.% Tm:CaF2, 3 at.% Tm, 3 at.% Y:CaF2 crystal has several advantages. Firstly, the absorption cross section is improved from 0.35 × 10−20 cm−2 to 0.45 × 10−20 cm−2 at 767 nm, and the fluorescence intensity had elevated 3.4 times. Secondly, the linewidth of the fluorescence spectrum and lifetime also increased from 164 nm to 191 nm and from 6.16 ms to 8.15 ms at room temperature, respectively. Furthermore, quantum efficiency improved from 58.2% to 80.3%. The maximum laser output power of 583 mW and slope efficiency of 25.3% were achieved in 3 at.% Tm, 3 at.% Y:CaF2 crystal under 790 nm diode pumping.

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