Effect of recording-beam ratio on diffraction efficiency of polarization holographic gratings in dye-doped liquid-crystal films.
The +1 order diffraction of polarization holographic gratings generated by two linear orthogonally polarized writing beams in dye-doped liquid-crystal films were increased by using two recording beams with unequal intensity. The maximum diffraction efficiency of the polarization holograms in our experimental sample can reach 23% when the intensity ratio of two recording beams is 7:1, and this value is almost triple that when the intensity ratio of two recording beams is 1:1.
Su
Wei-Chia
WC
Graduate Institute of Photonics, National Changhua University of Education, No. 1, Jin De Road,Changhua 500, Taiwan. wcsu@cc.ncue.edu.tw
Huang
Chi-Yen
CY
Chen
Jin-Yi
JY
Su
Wei-Huang
WH