تستخدم مادة غادولينيوم غاليوم غارنت GGG كوسط ليزري فعال عند إشابتها بعناصر
الأتربة النادرة (مثل النيوديميوم) و العناصر الإنتقالية (مثل الكروم). أدت الإشابة المزدوجة ل GGG
بالنيوديميوم و الكروم إلى زيادة الربح الليزري بشكل ملحوظ مما زاد الطلب عليها لأجل الليزرات عالية
الاستطاعة.
Gadolinium gallium garnet Gd3Ga5O12 (GGG) co-doped with chromium and
neodymium have attracted attention as an active material for high power solid state
laser.
References used
H.B. Puell U. Wostenbrink, Lasing properties of flashlamp pumped GGG crystals, SPIE High Power Solid State Lasers, 1021 (1988) 51-54
H. Lundet, H. Weidner, H. Fubstetter, High laser efficiency due to Cr3+ sensitization in Cr,Nd:GGG, SPIE High Power Solid State Lasers, 1021 (1988) 55-60
Y. Fujii, Recent progress in high-power slab laser in Japan, CLEO 1988, THV3, pp. 398-400
The present research aims at synthesizing micro-porous and fluorescent polymer by microwave assisted synthesis allowing to reduce preparation time of 3 days at 180 °C using conventional method.
The aim of this work is to study the rheological and mechanical properties of Poly(lactic acid) and High density polyethylene and blends (PLA/HDPE) in the molten state with recpect to shear stress, temperature and blends compositions using brabender mixer.
This work represent synthesis of new benzoxazines polymers based on
either phenol or hydroquinone as a phenolic compounds and para
aminophenol as primary amine and paraformaldehyde.
In this study, several samples of a common polymer (aniline-phenolformaldehyde)
we prepared by condensation polymerization method based
on aniline, phenol, formaldehyde and in the presence of a catalyst of
ammonia solution at different concentrations.
Photonic crystals is a low-loss periodic medium with periodic changes of
refractive index, which is used to control the light.
Theoretically, Photonic crystals can be studied using Maxwell equations, but
it’s difficult to find a general analytical