Fig. 1. Optical mechanical device with 30 cm long cavity frequency stability system

Fig. 2. Simulation results of vibration insensitivity of optical reference cavity

Fig. 3. The support structure of the ultra-stable reference cavity

Fig. 4. Measurement of vibration noise and frequency insensitivity

Fig. 5. Structure diagram of vacuum chamber and shielding layer

Fig. 6. Temperature attenuation effect of each frequency band before and after temperature control of outermost shielding layer

Fig. 7. Measurement of optical power sensitivity

Fig. 8. Optical technology noise evaluation

Fig. 9. Beat frequency result of that 30 cm long cavity system and the 10 cm reference cavity system and assessment of various noises in the long cavity system