Read More
Date: 31-1-2021
1550
Date: 14-3-2016
1653
Date: 20-1-2021
969
|
Plane–Parallel Resonator
The plane–parallel or flat–flat resonator, which can be considered a special case of the large-radius mirror configuration (R1 = R2 =∞), is extremely sensitive to perturbation. However, in an active resonator, that is, a resonator containing a laser crystal, this configuration can be quite useful. Heat extraction leads to thermal lensing in the active medium, this internal lens has the effect of transforming the plane–parallel resonator to a curved mirror configuration as explained later in this section. Therefore the thermally induced lens in the laser material brings the flat– flat resonator into geometric stability.
|
|
تفوقت في الاختبار على الجميع.. فاكهة "خارقة" في عالم التغذية
|
|
|
|
|
أمين عام أوبك: النفط الخام والغاز الطبيعي "هبة من الله"
|
|
|
|
|
قسم شؤون المعارف ينظم دورة عن آليات عمل الفهارس الفنية للموسوعات والكتب لملاكاته
|
|
|