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  • Quality Assessment of Variable Reflectivity Laser Mirrors with High Laser –Induced Damage Threshold and Structural Analysis

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عنوان URL للمقالة


رقم المقالة : JOPN-2308-1298 (R3) زيارة : 62 الصفحة: 1 - 15

10.30495/jopn.2023.32299.1298

نوع المخطوط: ابحاث

Quality Assessment of Variable Reflectivity Laser Mirrors with High Laser –Induced Damage Threshold and Structural Analysis

الموضوعات : فصلنامه نانوساختارهای اپتوالکترونیکی

Hasan Ebadian 1 , Omid Sheikhi 2 , Mahdi Mardiha 3

1 - Faculty of Applied Sciences. Malek- Ashtar University of Technology. Iran
2 - Faculty of Applied Sciences. Malek- Ashtar University of Technology. Iran
3 - Faculty of Applied Sciences. Malek- Ashtar University of Technology. Iran

تاريخ الإرسال : 07 الأربعاء , صفر, 1445 تاريخ التأكيد : 24 الثلاثاء , شعبان, 1445 تاريخ الإصدار : 20 الخميس , رجب, 1445

الکلمات المفتاحية: FESEM, Variable Reflectivity Mirrors (VRM), PVD, Laser induced damage threshold (LIDT),

ملخص المقالة :

Abstract: We report the results of an experimental study on the fabrication of a multilayer variable reflectivity laser mirror and the morphological analysis of optical thin film layers. In a design procedure, a series of variable reflectivity laser mirrors are fabricated and characterized with different methods. In this research, based on pulsed solid-state Nd:YAG lasers at 1064 nm, two types of variable reflectivity laser mirrors with (HfO2/SiO2) and (ZrO2/SiO2) materials are fabricated by electron beam evaporation method. The central reflectivity of R0 =30 and 35 % for two super Gaussian orders of n=3 and 4 is manufactured and qualified by ellipsometry and laser beam scan methods. The Laser-induced damage threshold experiments demonstrated that, the VRMs with multilayers of HfO2/SiO2, have a higher Laser-induced damage threshold than ZrO2/SiO2, which was 10 J/cm2 and 7 J/cm2, correspondingly. Also, in a novel and exact FESEM approach, the morphological structure of the VRM thin layers was monitored which gives a deeper insight into the layer structure and helped us to calibrate the PVD device for shaped VRM.

المصادر:


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