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Date: 31-1-2021
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Date: 17-3-2016
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Date: 24-1-2021
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Vanadates
Nd3+-doped yttrium orthovanadate (YVO4) has shown a relatively low threshold at pulsed operation. However, early studies of this crystal were hampered by severe crystal growth problems, and as a result YVO4 was discarded as a host.With the emergence of diode pumping, Nd :YVO4 has become an important solid-state laser material, because it has very attractive features, such as a large stimulated emission cross section and a high absorption of the pump wavelength, and the growth problem has been overcome for the small crystals required with this pump source.
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دراسة: حفنة من الجوز يوميا تحميك من سرطان القولون
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تنشيط أول مفاعل ملح منصهر يستعمل الثوريوم في العالم.. سباق "الأرنب والسلحفاة"
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السيد الإشكوري: عدد الكتب الموصوفة في موسوعة مؤلّفات الإمامية بلغت 14 ألف كتاب
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