3 results about "Picosecond laser pulse" patented technology

Disclosed is a facility (6) for stripping a moving metal product (3), comprising: - a stripping assembly (8) having at least one picosecond pulse laser device (10), each configured to emit picosecond laser pulses onto the surface of the moving metal product (3) in order to strip it, - a control unit (12) suitable for acquiring information relating to the moving metal product (3) and configured to: - determine operating parameters to be applied to the stripping assembly (8) in order to achieve stripping of the oxide layer on the surface of the metal product (3) by emission, by each laser device (10), of picosecond laser pulses onto the metal product (3) surface, - apply these operating parameters to the stripping assembly (8) in order to strip the surface of the metal product (3).

This invention discloses a picosecond-level laser pulse generation device and method. It directly generates laser pulses with a dynamic extinction ratio of over 50dB by driving a laser with a radio frequency drive signal without DC bias. This allows for the simple reuse of conventional electro-optic intensity modulators to achieve a dynamic extinction ratio of over 100dB on the laser pulse. The high bandwidth characteristics of the electro-optic intensity modulator also allow the laser pulses directly generated by the laser to have a picosecond-level pulse width. Ultimately, this allows for the provision of laser pulses with a dynamic extinction ratio greater than 100dB and a picosecond-level pulse width through a solution with smaller device size, wider bandwidth, lower cost, and lower power consumption, while meeting the requirements of long-distance detection and high-resolution detection.

The application provides a GHz picosecond laser pulse generation device and method based on FPGA. The GHz picosecond laser pulse generation method comprises the following steps: generating four paths of clock signals with a phase interval of 90 degrees and a frequency of not less than 250 MHz in an FPGA by using a clock synthesizer, driving a half-period pulse generation unit by each clock to generate a pulse with a width less than a clock period, generating a picosecond-level pulse signal from the pulse, and generating a GHz pulse signal from the four paths of picosecond-level pulse signals by a pulse synthesis unit, which is used to drive a subsequent laser. The GHz picosecond laser pulse generation device and method based on FPGA comprise a clock synthesis unit, a half-period pulse width generation unit, a picosecond pulse generation unit and a pulse synthesis unit, and the GHz pulse has good consistency and high stability.