Abstract: A laser device for laser detection and ranging (LiDAR), comprising: a laser oscillator configured for emitting a pulsed laser beam, a laser beam amplifier disposed on the laser beam path, a pumping unit disposed between the laser oscillator and the laser beam amplifier and configured to, when receiving an incoming continuous pumping beam having the pumping wavelength, transmit the laser beam along the laser direction; send the pumping beam for pumping the laser oscillator in the opposite direction to the laser direction, and transmit a reflected part of the pumping beam for pumping the laser beam amplifier, in the laser direction.

Abstract: The invention provides an optical arrangement for a light detecting system, the optical arrangement being configured: to steer an illumination beam along an illumination optical path from a laser source to a target to be sensed, in a transmitting direction, and to transmit a reflected beam along a return optical path from the target to an optical detector, in a receiving direction, wherein the reflected beam comprises a reflection of the optical beam on the target, the optical arrangement comprising a dichroic beamsplitter and a multi-clad optical fiber.

Abstract: A scanning device for laser detection and ranging (LiDAR), the scanning device includes, arranged in optical free space: an optical input for receiving a pulsed broadband laser beam having a linear polarization; a separating unit configured for transmitting the laser beam along a scanning optical path while changing the polarization into a circular one; a wavelength selection unit; and a scanning unit. The separating unit is configured for deviating the reflections (4) on a broadband detector while changing the orthogonal circular polarization into an orthogonal linear polarization compared to the linear polarization of the laser beam. The broadband detector is configured to receive the deviated reflections, and to detect a time-of-flight and an optical power of the light reflection.

Abstract: A method for identifying a composition material of an object located in an environment surrounding at least one device, the object moving relative to the device, in which at least one sensor is mounted on the device and communicates with at least one central processing unit.