Fig. 1. Schematic diagram of fast axis distributions of VHP. (a) VHP(-1,0); (b) VHP(1,0); (c) VHP(1,-45∘); (d) VHP(3,0)

Fig. 2. Schematic diagram of experimental device

Fig. 3. One-order RP and AP CVBs generated by different methods.(a)-(e) are 1-order RP, 1-order AP, m2+m1 RP,m2+m1 AP, m1+m2 RP, m1+m2 AP, respectively; (a1)-(e3) are light intensities after passing through polarizing plate in transmission direction of 0°, 45° and 135°, respectively

Fig. 4. Stokes parameter measurement results of CVBs produced by different cascade methods. (a)-(c) are 1-order RPs; (d)-(f) are one-order APs; (a1)-(f3) are Stokes parameters S1、S2、S3

Fig. 5. Polarization distribution diagram of one-order CVB. (a1) and (a2) are distributions of polarization state and polarization direction angle of RP, respectively; (b1) and (b2) are distributions of polarization state and polarization direction angle of AP, respectively

Fig. 6. Polarization distribution diagram of three-order CVB. (a1) and (a2) are distributions of polarization state and polarization direction angle of RP, respectively; (b1) and (b2) are distributions of polarization state and polarization direction angle of AP, respectively

Fig. 7. Experimental results of influence of center misalignment on preparation of CVB from cascade VHP. (a)-(c) are 10, 18 , and 34-order RPs of mi+2 cascade, respectively; (a1)-(c1) are 10, 18 , and 34-order RPs of 2+mi cascade, respectively; (a2)-(c2) are mi+2 cascade, center is offset from Δ=0.75mm, 10, 18, 34-order RPs, respectively; (a3)-(c3) are 2+mi cascade, center is offset from Δ=0.75mm, 10, 18, 34-order RPs, respectively

Fig. 8. High-order CVB results prepared by cascading multiple VHPs. (a1) 100-order RP beam prepared by 3 VHPs cascade systems and (a2) light intensity diagram after beam passes through horizontal polarizer; (b1) 45-order RP beam prepared by 4 VHPs cascade systems and (b2) light intensity diagram after beam passes through horizontal polarizer