Tunable diode laser system with external cavity in Littman configuration

摘要

The invention relates to an adjustable system (1) of a diode laser (3) having an external resonator in the Littman configuration. The inventive system comprises a diffraction grid (5), a mirror (8) which is mounted on a pivotal support arm (7) and which is to be pivotally arranged around an axis. Said axis runs perpendicular to the beam path plane, runs inside the grid surface plane, and is at the same distance from the plane of the end mirror of the laser diode (3) as it is from the plane of the surface of the mirror (8). In addition, the inventive system comprises an adjusting element (14, 15) for moving the mirror (8) around the support arm axis (9) and has means (13, 13') for adjusting the support arm axis (9) with which said axis can be moved relative to the laser diode (3). The system also comprises means for adjusting the support arm axis in order to alter the angle of the support arm axis with regard to the beam path plane. The inventive adjustable system (1) enables the mirror pivotal axis and the feedback of the aforementioned diode lasers to be simultaneously adjusted in a simple manner.