Fig. 1. Schematic of DOW

Fig. 2. Internal light path of DOW

Fig. 3. Angles between the output light and the input light under DOW with different α (a), different n (b) and unparallel planes (c)

Fig. 4. Values of ΔL in different α

Fig. 5. Values of ΔL in different n

Fig. 6. Values of ΔL in different Δh₁+Δh₂

Fig. 7. ΔL produced by DOW with different optical material

Fig. 8. Angle of incidence on inclined plane of wedge

Fig. 9. Double optical wedges

Fig. 10. Schematic of double corner cube reflector ring cavity

Fig. 11. Resonance signals based on DOW

Fig. 12. DOW with opposite vertical plane

Fig. 13. ΔL produced by DOW with opposite vertical plane and DOW with opposite inclined plane

Fig. 14. DOW based on regular wedge

Fig. 15. Cascaded DOWs