Quest for high damage performance: metasurfaces for high power laser applications (Conference Presentation)

2019 ◽  
Author(s):  
Nathan Ray ◽  
Jae Hyuck Yoo ◽  
Hoang Nguyen ◽  
Michael Johnson ◽  
Salmaan H. Baxamusa ◽  
...  
Keyword(s):  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications

ALD anti-reflection coatings at 1ω, 2ω, 3ω, and 4ω for high-power ns-laser application

2018 ◽  
Vol 7 (1-2) ◽  
pp. 23-31 ◽  
Author(s):  
Hao Liu ◽  
Lars Jensen ◽  
Ping Ma ◽  
Detlev Ristau
Keyword(s):  
High Power ◽  
High Surface ◽  
Laser System ◽  
Damage Threshold ◽  
Atomic Layer ◽  
Intensity Difference ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications ◽  
Laser Induced Damage

AbstractAtomic layer deposition (ALD) facilitates the deposition of coatings with precise thickness, high surface conformity, structural uniformity, and nodular-free structure, which are properties desired in high-power laser coatings. ALD was studied to produce uniform and stable Al2O3and HfO2single layers and was employed to produce anti-reflection coatings for the harmonics (1ω, 2ω, 3ω, and 4ω) of the Nd:YAG laser. In order to qualify the ALD films for high-power laser applications, the band gap energy, absorption, and element content of single layers were characterized. The damage tests of anti-reflection coatings were carried out with a laser system operated at 1ω, 2ω, 3ω, and 4ω, respectively. The damage mechanism was discussed by analyzing the damage morphology and electric field intensity difference. ALD coatings exhibit stable growth rates, low absorption, and rather high laser-induced damage threshold (LIDT). The LIDT is limited by HfO2as the employed high-index material. These properties indicate the high versatility of ALD films for applications in high-power coatings.

scholarly journals High Power Laser Applications to Aerospace

2015 ◽  
Vol 43 (9) ◽  
pp. 611
Author(s):  
Akihiro SASOH ◽  
Toshikazu EBISUZAKI
Keyword(s):  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications

Broadband amplification at Kr 2 F trimer transition for short-pulse high-power laser applications

2010 ◽  
Author(s):  
Alexey O. Levchenko ◽  
Nikolai N. Ustinovskii ◽  
Vladimir D. Zvorykin
Keyword(s):  
High Power ◽  
Short Pulse ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications

Deformable mirror for high power laser applications

2015 ◽  
Author(s):  
Libor Mrňa ◽  
Martin Sarbort ◽  
Miroslava Hola
Keyword(s):  
High Power ◽  
Deformable Mirror ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications

Yb3+ doped (Ca,Sr,Ba)F2 for high power laser applications

Laser Physics ◽  
2009 ◽  
Vol 20 (2) ◽  
pp. 533-536 ◽  
Author(s):  
J. L. Doualan ◽  
P. Camy ◽  
A. Benayad ◽  
V. Ménard ◽  
R. Moncorgé ◽  
...  
Keyword(s):  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications

scholarly journals Does hypericin boost the efficacy of high-power laser? A preliminary experimental study on rats

2014 ◽  
Vol 132 (6) ◽  
pp. 348-352
Author(s):  
Murat Zor ◽  
Serdar Goktas ◽  
Ibrahim Yildirim ◽  
Unal Orhan Zorba ◽  
Seref Basal ◽  
...  
Keyword(s):  
High Power ◽  
Quadriceps Muscle ◽  
Ktp Laser ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Applications ◽  
Symptomatic Benign Prostatic Hyperplasia ◽  
Military Medical Academy ◽  
Medical Academy ◽  
Laser Systems

CONTEXT AND OBJECTIVE: Lasers are widely used in treating symptomatic benign prostatic hyperplasia. In current practice, potassium titanyl phosphate (KTP) lasers are the most common type of laser systems used. The aim here was to evaluate the rapid effect of high-power laser systems after application of hypericin.DESIGN AND SETTING: Experimental animal study conducted in the Department of Urology, Gülhane Military Medical Academy, Ankara, Turkey, in 2012.METHODS: Sixteen rats were randomized into four groups: 120 W KTP laser + hypericin; 120 W KTP laser alone; 80 W KTP laser + hypericin; and 80 W KTP laser alone. Hypericin was given intraperitoneally two hours prior to laser applications. The laser incisions were made through the quadriceps muscle of the rats. The depth and the width of the laser incisions were evaluated histologically and recorded.RESULTS: To standardize the effects of the laser, we used the ratio of depth to width. These new values showed us the depth of the laser application per unit width. The new values acquired were evaluated statistically. Mean depth/width values were 231.6, 173.6, 214.1 and 178.9 in groups 1, 2, 3 and 4, respectively. The most notable result was that higher degrees of tissue penetration were achieved in the groups with hypericin (P < 0.05).CONCLUSIONS: The encouraging results from our preliminary study demonstrated that hypericin may improve the effects of KTP laser applications.

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