Glossary

Propagation Direction

reZonator supposes a beam is propagating from left to right in the schema. For single-pass schema, it is as if a light source would be located just before the leftmost element of the schema and is directed to the right side.

_images/propagation_sp.png

For resonators, it is just the chosen primary direction. In standing-wave resonator, the beam reflects from the rightmost element and does round-trip returning to the leftmost one.

_images/propagation_res.png

When the round-trip matrix is calculated, elements’ matrices are multiplied starting from some reference element and in the direction opposite to beam propagation, as the ray-matrix approach supposes.

Ray Vector

Ray vector represents a geometric beam approximation when a beam described by two parameters - a distance from the optical axis r and an angle between the beam and the optical axis V.

_images/ray_vector.png

When a beam traverses an optical system, parameters of the output beam can be expresses from parameters of the input beam and system’s ray matrix M = [A, B; C, D].

_images/ray_vector_1.png

reZonator can compute ray vector propagation in single-pass schemas, see Pump mode: Ray vector.

Working Planes

Tangential Plane, T-plane

The tangential plane is the plane containing all the resonator’s elements (the plane of an optical stand). Beams are refracted or reflected in this plane.

Sagittal Plane, S-plane

The sagittal plane is the plane containing the element’s optical axis and perpendicular to the tangential plane.

_images/planes_ts.png