Fig. 1. Thin-diameter polarization-maintaining solid-core photonic crystal fiber. (a) Φ80 μm/110 μm fiber in 1550 nm band; (b) Φ60 μm/100 μm fiber in 850 nm band

Fig. 2. Pressure control equipment for photonic crystal fiber

Fig. 3. Hollow core photonic crystal fibers. (a) 7-core hollow core photonic crystal fiber; (b) 19-core hollow core photonic crystal fiber

Fig. 4. Schematic diagram of interferometric photonic crystal fiber optic gyroscope.

Fig. 5. Splicing between photonic crystal fiber coil and integrated optical modulator

Fig. 6. Coupling between photonic crystal fiber coil and integrated optic chip

Fig. 7. Direct coupling system between fiber coil and integrated optical chip

Fig. 8. Interferometric solid-core photonic crystal fiber optic gyroscope with high precision

Fig. 9. Interferometric hollow-core photonic crystal fiber optic gyroscope prototype

Fig. 10. Hollow-core photonic crystal fiber ring resonator based on single optical beam splitter