J4 ›› 2015, Vol. 32 ›› Issue (5): 555-562.

• Laser Tech. and Devices • Previous Articles     Next Articles

Manipulation of laser polarization based on the linear electro-optic effect with quasi-phase matching

ZHONG Dongzhou, WANG Yuqing   

  1. School of Information Engineering, Wuyi University, Jiangmen  529020, China
  • Received:2014-11-03 Revised:2014-11-28 Published:2015-09-28 Online:2015-09-28

Abstract:

Based on linear electro-optic effect with quasi-phase matching in periodically poled LiNbO3 crystal, the evolution laws of the output laser polarization with the applied electric field have been explored by means of the poincare sphere theory, under different the duty ratio of the crystal and the temperature of one. It is found that the evolution of the output laser polarization is very sensitive to the Based on linear electro-optic effect with quasi-phase matching in periodically poled LiNbO3 crystal, the evolution laws of the output laser polarization with the applied electric field have been explored by means of the poincare sphere theory, under different the duty ratio of the crystal and the temperature of one. It is found that the evolution of the output laser polarization is very sensitive to the applied electric field E0, the crystal duty ratio D and the crystal temperature T0. With the T0 fixed at 273K, and the D fixed at 0.25, 0.5 and 0.75, the output polarization appears periodical evolution with the increase of the E0. If the D is of 0.5, and the T0 is of 263K, 293K and 313K, the evolutions of the laser polarization show irregular. Arbitrary polarized light can be performed by reasonable selection of a certain applied electric field, the duty ratio and the temperature. These results are helpful to optimization design of the polarization controller based on PPLN crystal.

Key words: laser technology, control of laser polarization state, poincare sphere theory, linear electro-optic effect with quasi-phase matching, periodically poled LiNbO3 crystal

CLC Number: