Contamination in beampath and laser induced damage of optics in high power laser system

Xinxiang, 苗心向 Miao; Xiaodong, 袁晓东 Yuan; Haibing, 吕海兵 Lü; Xiaofeng, 程晓锋 Cheng; Qun, 贺群 He; Hai, 周海 Zhou; Wanguo, 郑万国 Zheng; Guorui, 周国瑞 Zhou

doi:10.3788/hplpb20152703.32033

Cited by 1 publication

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“…[9][10][11][12] Other scientists also studied the mode coupling mechanism and dispersion equation of the HCW. [13][14][15] In general, the current research in this field is mainly focused on microwave and millimeter wave band. [16,17] The design of HCW is one of the key technologies in the development of the HCW based terahertz wave amplifier.…”

Section: Introductionmentioning

confidence: 99%

Study on dispersion characteristics of terahertz waves in helical waveguides

Sun¹,

Zhang²,

Zhang³

et al. 2020

Chinese Phys. B

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Corresponding to the atmospheric transmission windows of the electromagnetic spectrum in the low terahertz range, the mode coupling and dispersion characteristics of two helically corrugated waveguides (HCW) in the frequency ranges of 90 GHz–100 GHz and 260 GHz–265 GHz are studied. Through analytic calculations and numerical simulations, dispersion curves and structural parameters of the two frequency ranges waveguides are obtained. A novel method was proposed to obtain the dispersion of the HCW from the eigenwave solution using a periodic boundary condition. The HCW in a frequency range of 90 GHz–100 GHz was fabricated and its dispersion performance was measured. By comparing the measured results with the theoretical and the simulated results, the validity of the analytical and simulation method is verified. Limited to our machining capability, the dispersion of the 260 GHz–265 GHz HCW was only simulated and calculated and it was found that the results agree well with each other.

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