Polarization control technology of fiber front-end system in ICF driver

To meet the requirement on the quality and the stability of the output pulse from the fiber front-end system in ICF driver, the polarization characteristics of the fiber system have been analyzed and different polarization control technologies have been researched by the experiments. For the narrow spectral width (several pm) and short pulse (several ns) of the system, considering the requirement on the time character in the final output of the system, the special average depolarization has been adopted. As a result, the complete depolarization of the light signal can be realized efficiently and the stability of the system with the depolarizer achieves 1.72% .