Pulse width adjustable pulse cluster laser generating device and method

Abstract

This invention discloses a pulse width-adjustable pulse cluster laser generation device and method, belonging to the field of laser technology. It includes: a long-pulse laser, a waveplate and a rotating device, and a polarization beam splitter and combiner. The long-pulse laser is used to output linearly polarized long-pulse laser light. The waveplate and rotating device are used to rotate the half-waveplate to convert the long-pulse laser light into linearly polarized laser light with periodically changing polarization. The polarization beam splitter and combiner is used to split the periodically polarized linearly polarized laser light into a first sub-beam and a second sub-beam with orthogonal polarization states. The first sub-beam is guided by a reflecting element, and the second sub-beam is delayed by an optical delay device before being combined to output a pulse cluster. This invention can achieve a wide range of pulse width and repetition frequency adjustment and peak power multiplication with a simple structure and low cost, and can be widely used in materials processing, biomedicine, lidar, and optical waveguide microwave technology.

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