An optical resonator assembly mounted externally on a hermetically sealed gas transport laser comprises a U-shaped tubular bench secured to the laser housing top wall and having an elongated beam with legs extending at right angles to opposite ends, respectively, of the beam adjacent to the front and rear walls of the laser housing. Flat bases depend from the respective bench legs and overlay optical windows in the front and rear housing walls through which the internally generated laser beam passes. The bases have openings aligned with the windows, respectively, and adjustably mount mirror support plates, respectively, adjacent to those openings. Mirrors attached to the support plates define the laser optical cavity. The bench is a rigid tubular structure providing stable support for the optical components and also constituting a fluid conduit for carrying cooling air to minimize thermally induced dimensional changes.
An optical resonator has two resonator mirrors disposed opposite one another on a mirror carrier which is divided at an angle relative to a perpendicular plane to the optical axis. Precise adjustment of the mirror spacing is provided by movement along the abutting faces at the dividing plane to match the mirror spacing to the wavelength of the laser emission for frequency tuning.
A fast axial flow folded laser includes a vessel which houses heat exchangers and a pump which imparts the pumping action throughout the laser. Only one housing is necessary and this housing can also be used as an optical bench for the resonator. In one embodiment a positive displacement rotary pump is utilized and a retroreflector included to mount three fold mirrors. In the folded configuration the retroreflector provides angular stability in any two orthogonal planes parallel to the laser beam.
In order to improve a laser amplifying system, comprising a solid-state member which has flat sides located opposite one another, is of a plate-like design and comprises a laser-active medium, a laser radiation field passing through the solid-state member, a pumping radiation field pumping the laser-active material, a cooling device which absorbs heat from the solid-state member via a first flat side by means of a fluid cooling medium flowing in it, and a reflector for the laser radiation field arranged on the first flat side, of the generic type in such a manner that the solid-state member may be arranged and aligned in as optimum a manner as possible it is suggested that a support with a stable shape be provided for the solid-state member, this support having the laser radiation field passing through it and being transparent for it, that the solid-state member be supported areally on a support surface of the support with a stable shape with its second flat side and be arranged so as to be defined in its shape and position essentially only via the support surface interacting with the second flat side.
A fast axial flow laser includes a vessel which houses heat exchangers and a pump which imparts the pumping action throughout the laser. Only one housing is necessary and this housing can also be used as an optical bench for the resonator. In one embodiment a positive displacement rotary pump is utilized and a retoreflector included to mount three fold mirrors. In the folded configuration the retroreflector provides angular stability in any two orthogonal planes parallel to the laser beam.
Known power lasers have outstanding electrical, optical and mechanical properties, in spite of different temperature conditions during switching on and during operation. However, they are expensive. These properties are retained, despite cheaper production costs in that, starting from a solid monolithic optical bench, several mirror blocks and intermediate blocks are mechanically rigidly connected to this, and are shaped such that they do not deflect during chip-removing machining, and those bores necessary for the laser path are only then provided.
