A laser output device and laser equipment

Abstract

A laser output device and laser equipment for converting continuous laser output from a continuous single-frequency laser into pulsed laser, comprising: a microcontroller, an electro-optical modulation drive circuit, an amplification pump drive circuit, and an output optical path of the continuous single-frequency laser. The electro-optical modulator and the optical amplifier are arranged in sequence; the microcontroller is electrically connected to the electro-optical modulator through the electro-optical modulation driving circuit; the microcontroller is used to control the electro-optical modulation driving circuit to drive the electro-optical modulator to modulate the continuous laser output from the continuous single-frequency laser into the first A pulsed laser with a waveform; the microcontroller is electrically connected to the optical amplifier through the amplifying pump driving circuit; the microcontroller is used to control the amplifying pumping drive circuit to drive the optical amplifier to amplify the pulsed laser of the first waveform into the pulsed laser of the second waveform, And control the output time of the pulse laser of the second waveform. The laser output device and the laser equipment can output pulse laser with narrow line width and high signal-to-noise ratio.

Description

technical field [0001] Embodiments of the present invention relate to short-pulse laser modulation technology, and in particular, to a laser output device and laser equipment. Background technique [0002] Single-frequency fiber lasers are one of the research hotspots in the field of fiber lasers. Compared with continuous single-frequency fiber lasers, the research of pulsed single-frequency fiber lasers has greater technical difficulties, and pulsed single-frequency fiber lasers are also laser radar and laser ranging. A high-quality light source that is urgently needed in other directions. [0003] At present, the pulse generation technology mainly includes Q-switching technology, mode locking technology, laser direct drive technology and acousto-optic modulator. Among them, the pulse energy output by the Q-switching technology is limited, and a special driver is required to amplify the pulse energy in multiple stages, resulting in a relatively large volume of the overall ...

AI Technical Summary

Problems solved by technology

Among them, the pulse energy output by Q-switching technology is limited, and it needs to be equipped with a special driver to amplify the pulse energy in multiple stages, resulting in a relatively large volume of the overall system, which has certain limitations for occasions with relatively strict volume requirements; the mode-locking technology mainly uses Various factors modulate the longitudinal mode of oscillation in the laser cavity, the structure is more complex, and the average power of the output laser is low, and the output frequency is relatively fixed, and the frequency cannot be set freely; the direct drive technology of the laser is difficult to generate stable, pulsed Electric drive pulses with short width and low output power cannot directly drive lasers, and the delay and jitter of electric drive pulses are large, which is not suitable for applications such as laser ranging, 3D scanning and lidar. In addition, direct drive The laser phase noise and intensity noise of the output of the laser are relatively poor; the AOM is affected by the propagation speed of the sound field in the medium material and the focusing degree of the light field area in the medium, and the rise time of the AOM cannot be very fast. Short, so the pulse width of its light pulse is difficult to be less than tens of ns, which cannot meet the requirements of single-frequency short pulse width

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