Disclosed are optical arrangements including: a disk-shaped laser-active medium, a deflecting device, having a plurality of mirror elements on which mirror faces for deflecting a laser beam are formed, and having a base body on which the mirror elements are fastened, the mirror faces of the mirror elements being oriented in such a way that the laser beam is deflected by a respective mirror face via the disk-shaped laser-active medium to another mirror face. The mirror elements are formed in one piece or are monolithically joined, and have a connecting section that is formed rotationally symmetrically with respect to a center axis and is rigidly connected by a material-fit connection or a direct connection to the base body.

Disclosed are optical arrangements including: a disk-shaped laser-active medium, a deflecting device, having a plurality of mirror elements on which mirror faces for deflecting a laser beam are formed, and having a base body on which the mirror elements are fastened, the mirror faces of the mirror elements being oriented in such a way that the laser beam is deflected by a respective mirror face via the disk-shaped laser-active medium to another mirror face. The mirror elements are formed in one piece or are monolithically joined, and have a connecting section that is formed rotationally symmetrically with respect to a center axis and is rigidly connected by a material-fit connection or a direct connection to the base body.

A laser device includes an excitation light source, a resonator which receives excitation light from the excitation light source and generates laser light, an absorption cell to which the laser light is emitted, a light converter which converts the laser light passing through the absorption cell to a light output signal, a third order differential lock-in amplifier which generates a third order differential signal of the light output signal, and a controller. When a predetermined waveform of the third order differential signal is detected, the controller includes a return controller that determines a return direction of a resonator length based on the predetermined waveform and a resonator length controller that changes the resonator length to the return direction.

A laser device includes an excitation light source, a resonator which receives excitation light from the excitation light source and generates laser light, an absorption cell to which the laser light is emitted, a light converter which converts the laser light passing through the absorption cell to a light output signal, a third order differential lock-in amplifier which generates a third order differential signal of the light output signal, and a controller. When a predetermined waveform of the third order differential signal is detected, the controller includes a return controller that determines a return direction of a resonator length based on the predetermined waveform and a resonator length controller that changes the resonator length to the return direction.

A scanning laser radar comprises a transmitting unit comprising a laser and a first lens; a receiving unit comprising a second lens and a light sensor; an actuating unit, wherein the laser and the light sensor are located on the actuating unit, the actuating unit carries and moves with the laser and the light sensor.

A scanning laser radar comprises a transmitting unit comprising a laser and a first lens; a receiving unit comprising a second lens and a light sensor; an actuating unit, wherein the laser and the light sensor are located on the actuating unit, the actuating unit carries and moves with the laser and the light sensor.

A light source for an imaging system. The light source includes a microresonator laser array having opposing mirrors arranged substantially parallel to one another. A laser gain medium is between the opposing mirrors. An array of microrefractive elements is arranged to stabilize the microresonator. A pump laser's output is shaped by a lens that directs it toward the micro-resonator laser array. An output lens directs a plurality of laser beams from the microresonator laser array to be incoherently combined at an object to be illuminated.

A laser apparatus is provided, which includes an optical reflection and gain unit, an optical modulation unit and a polarizing selection unit. The optical reflection and gain unit includes a gain medium and at least two dichroic surfaces, and is configured to generate a laser beam. The optical modulation unit and the optical reflection and gain unit form a cavity, and the optical modulation unit is configured to adjust phase boundary conditions of the cavity. The optical modulation unit includes portions that respectively correspond to optical phase boundaries in the cavity, so as to allow an optical field in the cavity to pass through the optical modulation unit at least twice. The polarizing selection unit is disposed between the optical reflection and gain unit and the optical modulation unit, and is configured to adjust the polarizing direction of the optical field incident to the optical modulation unit.

A laser apparatus is provided, which includes an optical reflection and gain unit, an optical modulation unit and a polarizing selection unit. The optical reflection and gain unit includes a gain medium and at least two dichroic surfaces, and is configured to generate a laser beam. The optical modulation unit and the optical reflection and gain unit form a cavity, and the optical modulation unit is configured to adjust phase boundary conditions of the cavity. The optical modulation unit includes portions that respectively correspond to optical phase boundaries in the cavity, so as to allow an optical field in the cavity to pass through the optical modulation unit at least twice. The polarizing selection unit is disposed between the optical reflection and gain unit and the optical modulation unit, and is configured to adjust the polarizing direction of the optical field incident to the optical modulation unit.

The invention relates to an optical resonator (1) for a laser device (20), in particular for a microchip solid-state laser, comprising an optical medium (4) which is arranged between a first and a second reflective element (2, 3) that are arranged at a distance from one another in a longitudinal direction (P). The optical resonator length is specified by the distance from the first reflective element (2) to the second reflective element (3) in the longitudinal direction (P), the longitudinal extent of the medium (4) arranged between the reflective elements, and the refractive index thereof. According to the invention, the optical resonator length varies in at least one lateral direction (L) running perpendicularly to the longitudinal direction (P). The invention further relates to a laser device (20) comprising such a resonator (1) and to a method for adjusting the laser device (20).