TY  - JOUR
AU  - HUANG, Shuiping
AU  - QIAN, Xiaoqing
PY  - 2025
TI  - CALCULATION OF THE TRANSVERSE ELECTRO-OPTICAL MODULATION CHARACTERISTICS OF LiNbO3 CRYSTALS WITH THE ELECTRIC FIELD ALONG ITS OPTICAL AXIS
JO  - Physics and Engineering
SN  - 1009-7104
SP  - 196
EP  - 201
VL  - 35
IS  - 1
AB  - Starting from the refractive index ellipsoid equation and the electro-optic coefficient matrix of the LiNbO3 crystal, the transverse electro-optic modulation characteristics of the LiNbO3 crystal when an electric field is applied along the optical axis direction were calculated and analyzed. The results show that due to the presence of natural phase difference, the electro-optic modulation curve of the LiNbO3 crystal does not necessarily pass through the coordinate origin. At the same time, the electro-optic modulation curve of the crystal is very sensitive to small deviations in the direction of light transmission within the plane determined by the y and z axes, leading to randomness in the demodulation signal waveform of the sine modulation signal at zero voltage in experiments, but this does not affect the measurement results of the half-wave voltage of the LiNbO3 crystal. These results and conclusions can not only well answer the doubts students have in experiments but also serve as a good reference for experimental teachers and related experimental personnel.
UR  - https://doi.org/10.26599/PHYS.2025.9320133
DO  - 10.26599/PHYS.2025.9320133