Four-channel off-axis holography is proposed to simultaneously understand the polarization states and the mode coefficients of linearly polarized (LP) modes in few-mode fiber. Far-field off-axis holograms in the four ...Four-channel off-axis holography is proposed to simultaneously understand the polarization states and the mode coefficients of linearly polarized (LP) modes in few-mode fiber. Far-field off-axis holograms in the four polarization directions ofthe fiber laser were acquired at the same moment through a four-channel holographic device. The weights, the relativephase differences, and the polarization parameters of the vector fiber laser mode can be solved simultaneously. The simulated and experimental mode analysis of the laser output by 1060-XP fiber with 6 LP modes at 632.8 nm is conducted, whichshows that the similarity of the total intensity distribution of the laser before and after mode analysis is above 0.97. Themode polarization states, the mode weights, and the relative phase differences of the few-mode laser can be determinedsimultaneously in a single shot by four-channel off-axis holography.展开更多
基金supported by the National Natural Science Foundation of China(No.61875087)。
文摘Four-channel off-axis holography is proposed to simultaneously understand the polarization states and the mode coefficients of linearly polarized (LP) modes in few-mode fiber. Far-field off-axis holograms in the four polarization directions ofthe fiber laser were acquired at the same moment through a four-channel holographic device. The weights, the relativephase differences, and the polarization parameters of the vector fiber laser mode can be solved simultaneously. The simulated and experimental mode analysis of the laser output by 1060-XP fiber with 6 LP modes at 632.8 nm is conducted, whichshows that the similarity of the total intensity distribution of the laser before and after mode analysis is above 0.97. Themode polarization states, the mode weights, and the relative phase differences of the few-mode laser can be determinedsimultaneously in a single shot by four-channel off-axis holography.
