The development status of picosecond laser

This article describes the current state of the picosecond laser

Categories:Picosecond Laser
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Published on:2021-07-27

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The first application of picosecond laser in mass production, The Photonics West 2005, was reported.1 for 20ps pulse durationμJ's pulse is focused on a thin steel foil, and a series of concentric rings are removed in the direction of the pulsed beam.Different concentric rings form a disc, different discs that remove material form a conical hole that acts as a nozzle for ink injection in a professional, high-quality print head.

Over the past few years, most laser manufacturers have focused on the development of picosecond laser.These picosecond laser require a sophisticated CPA technique to maintain peak power density within an amplification step at a certain damage threshold.In this way, pulse energy at the mJ level can be generated, but the repetition rate is limited to a few KHZ.

By comparison, hundred μJ high pulse energy is beneficial for drilling or cutting thick materials.An example is the drilling of injecting nozzles into a diesel engine, where 1 mm thick plate material has to be precisely punched so that no further cleaning is required.

A company developed a picosecond laser for this application.This picosecond laser's laser system does not require CPA technology because its pulse time is in the picosecond range.The laser working substance Nd:YVO4 allows direct pumping with a laser diode, resulting in high pulse energy and high repetition frequency.The average power output of a picosecond laser laser system is 10W at 10ps with a pulse duration of 1064 nm. Its laser beam is close to the diffraction limit and can be well focused.

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