Fig. 1. Schematic drawing of the method of fabricating the designed CaF2 disk resonator.

Fig. 2. Schematic of the experiment setup for the full polishing system for the CaF2 disk resonator. The customized machining system is used to manufacture the disks together with the circulation system, the air-supply system, and the servo system.

Fig. 3. (a), (b) Experimental photograph of the CaF2 disk resonator after grinding and polishing. The diameter d=10.5mm of the disk resonator after polishing. (c)–(e) The simulated light-field distribution of the disk resonator with thickness h=1mm for the transverse electric (TE) mode.

Fig. 4. (a) Measured Newton fringes periodicity for CaF2 disk resonator after polishing. (b) Three-dimensional profile of surface roughness in the detection vision-field size. (c) The surface roughness along the detected y axis direction.

Fig. 5. (a) Schematic of the experimental setup used for measuring the resonance of the CaF2 disk resonator. PD is photodetector. (b) The CaF2 disk resonator after polishing. (c), (d) Experimental photographs of the coupling system for the disk resonator and the tapered fiber.

Fig. 6. Drawing of the packaged disk-taper coupling system in a sealed hard disk. The red arrows illustrate flexible degrees of freedom in the customized mechanical component.

Fig. 7. Transmission spectra of disk-taper coupling system (a) before packaging and (b) after packaging.