Fig. 1. Cross-sectional diagram of circular-core pseudo-rectangle polarization-maintaining fiber

Fig. 2. Relationship between mode birefringence and stress zone length jof circular-core pseudo-rectangle polarization-maintaining fiber

Fig. 3. Cross-sectional diagram of elliptical-core pseudo-rectangle polarization-maintaining fiber

Fig. 4. Mode birefringent ellipticity of elliptical-core pseudo-rectangle polarization-maintaining fiber as a function of fiber core long half axis a. (a) Core ellipticity ρ is less than 1; (b) core ellipticity ρ is greater than 1

Fig. 5. Cross section of elliptical-core pseudo-rectangle polarization-maintaining fiber. (a) von Mises stress distribution in x direction; (b) stress-induced birefringence distribution

Fig. 6. Relationship between mode birefringences and d of elliptical-core pseudo-rectangle polarization-maintaining fiber and circular-core pseudo-rectangle polarization-maintaining fiber

Fig. 7. Relationship between mode birefringences and stress zone sizes of elliptical-core pseudo-rectangle polarization-maintaining fiber and circular-core pseudo-rectangle polarization-maintaining fiber. (a) Stress zone length j; (b) stress zone width k

Fig. 8. Influence of wavelength on mode characteristics. (a) Influence on effective refractive index of fundamental mode; (b) influence on fiber mode birefringence