2 results about "Picosecond laser pulse" patented technology

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.