The ErFemto-780 ProL is an all-fiber femtosecond laser in the near infrared band, using an erbium-doped fiber laser combined with nonlinear crystal frequency doubling. The output wavelength is 780nm, the pulse width is 150fs, the repetition frequency is 80MHz, and the output power is 200mW, 500mW and 800mW. The light source is based on a highly stable fiber seed source, automatic mode-locked pulse technology, and low noise level Combined optical fiber amplification, nonlinear and dispersion fine management, with extremely high reliability and stability, suitable for a variety of scientific research and industrial applications, to meet the needs of system integration applications.