Fig. 1. Two-dimensional light intensity distributions of Gaussian beam with coma aberration in free space. (a) At different propagation distance z; (b) with different coma parameter kC3

Fig. 2. Counter line distributions of light intensity at different propagation distance z in free space

Fig. 3. Counter line distributions of light intensity at different propagation distance z in oceanic turbulence

Fig. 4. Counter line distributions of light intensity for different values of coma aberration coefficient kC3. (a1)-(c1) Free space; (a2)-(c2) weak oceanic turbulence (ω=-3); (a3)-(c3) strong oceanic turbulence (ω=-0.5)

Fig. 5. Centroid position (solid mark) and maximum light intensity position (hollow mark) of beam versus propagation distance z. (a) Free space; (b) weak oceanic turbulence; (c) strong oceanic turbulence

Fig. 6. Variations in wx and wy with propagation distance z. (a)(b) Free space; (c)(d) oceanic turbulence

Fig. 7. Variation in RE with coma aberration coefficient kC3. (a) Different ω; (b) different χT; (c) different ε

Fig. 8. Variation in β with coma aberration coefficient kC3

Fig. 9. PIB under different circumstances. (a) Free space; (b) oceanic turbulence