Picosecond Laser System With Fiber-Solid Hybrid Amplification

In recent years, picosecond lasers have developed rapidly and have been widely used in many fields such as precision processing, spectroscopy, ranging and medical treatment. A picosecond laser system with fiber-solid hybrid amplification is developed. Firstly, the central wavelength, polarization state and spectral width of the fiber seed source are optimized. The maximum energy can reach 100 nJ and the beam quality factor M-2 is less than 1.10. Furthermore, double-end pump structure is used to amplify the optical power of the seed. The output power are 2.24 W and 10.8 W at 100 kHz and 13 MHz, respectively. The pulse width is 10.2 ps. By optimizing the design of optical path and thermal management technology, a better beam quality M-2=1.2 is obtained. The research ideas and experimental results of this paper can provide an effective solution for further improving the power of amplifier.