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.

مواضيع ذات صلة

الليزرات والسوائل التي تصعد إلى الأعلى

الليزر والميزر

Flashtube Explosion

Tube Failure

Concave–Convex Resonator

Plano-Concave Resonator

Mirrors of Equal Curvature

Parasitic Oscillations

Prelasing

Depopulation Losses

The Three-Level System

Absorption of Pump Radiation by the Gain Medium and Transfer of Energy to the Upper Laser Level