scholarly journals Analysis on FM-to-AM conversion of SSD beam induced by etalon effect in a high-power laser system

2019 ◽  
Vol 7 ◽  
Author(s):  
Ping Li ◽  
Wei Wang ◽  
Jingqin Su ◽  
Xiaofeng Wei
Keyword(s):  
High Power ◽  
Shape Control ◽  
Order Approximation ◽  
Near Field ◽  
Laser System ◽  
General Situation ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Target ◽  
Etalon Effect

FM-to-AM (frequency modulation-to-amplitude modulation) conversion caused by nonuniform spectral transmission of broadband beam is harmful to high-power laser facility. Smoothing by spectral dispersion (SSD) beam is a special broadband beam for its monochromatic feature at the given time and space on the near field. The traditional method which uses the optical spectral transfer function as filters cannot accurately describe its AM characteristics. This paper presents the theoretical analysis of the etalon effect for SSD beam. With a low-order approximation, the analytic model of the temporal shape of SSD beam is obtained for the first time, which gives the detailed AM characteristics at local and integral aspects, such as the variation of ripples width and amplitude in general situation. We also analyze the FM-to-AM conversion on the focal plane; in the focusing process, the lens simply acts as an integrator to smooth the AM of SSD beam. Because AM control is necessary for the near field to avoid optics damage and for the far field to ensure an optimal interaction of laser–target, our investigations could provide some important phenomena and rules for pulse shape control.

Analysis of Near-Field Modulations Caused by Defects in High Power Laser System

2016 ◽  
Vol 43 (3) ◽  
pp. 0302002 ◽  
Author(s):  
尤科伟 You Kewei ◽  
张艳丽 Zhang Yanli ◽  
张雪洁 Zhang Xuejie ◽  
张军勇 Zhang Junyong ◽  
朱健强 Zhu Jianqiang
Keyword(s):  
High Power ◽  
Near Field ◽  
Laser System ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser System

Design and simulation of near-field filtering for high power laser system

2014 ◽  
Vol 26 (8) ◽  
pp. 81007
Author(s):  
吴登生 Wu Dengsheng ◽  
张翔 Zhang Xiang ◽  
熊宝星 Xiong Baoxing ◽  
庄振武 Zhuang Zhenwu ◽  
高帆 Gao Fan ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Laser System ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser System

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.

Near field analysis of CSG and BSG combined element under high power laser condition

2006 ◽  
Author(s):  
Xin Yao ◽  
Fuhua Gao ◽  
Yixiao Zhang ◽  
Lei Wang ◽  
Yongkang Guo ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Field Analysis ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Condition

Research on Nonlinear Degeneration and Compensation of Beam Quality in High Power Laser System

2014 ◽  
Vol 34 (2) ◽  
pp. 0214005
Author(s):  
张鲁薇 Zhang Luwei ◽  
李晓彤 Li Xiaotong ◽  
岑兆丰 Cen Zhaofeng ◽  
阮望超 Ruan Wangchao ◽  
罗红妹 Luo Hongmei
Keyword(s):  
High Power ◽  
Beam Quality ◽  
Laser System ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser System

Photoelectronic Trigger Module in High-Power Laser System

2011 ◽  
Vol 38 (5) ◽  
pp. 0517002
Author(s):  
张鹏 Zhang Peng ◽  
李学春 Li Xuechun ◽  
李国扬 Li Guoyang ◽  
张生佳 Zhang Shengjia
Keyword(s):  
High Power ◽  
Laser System ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser System

Identifying Defects in Thin Film of High Power Laser Lens by Using Near Field Microimaging Method

2017 ◽  
Vol 44 (1) ◽  
pp. 0103001
Author(s):  
白忠臣 Bai Zhongchen ◽  
黄兆岭 Huang Zhaoling ◽  
郝礼才 Hao Licai ◽  
陆安江 Lu Anjiang ◽  
秦水介 Qin Shuijie
Keyword(s):  
Thin Film ◽  
High Power ◽  
Near Field ◽  
High Power Laser ◽  
Power Laser
Sign in / Sign up

Export Citation Format

Share Document