Fig. 1. Structural diagram of optical fiber delay system

Fig. 2. Principle of optical pulse delay measurement

Fig. 3. Methods of time discrimination. (a) Constant ratio timing method; (b) threshold method; (c) extremum method

Fig. 4. Schematic of effect of loss on delay measurement

Fig. 5. Schematic of effect of dispersion on delay measurement

Fig. 6. Experimental setup for optical fiber delay system

Fig. 7. Principle diagram of data refresh rate test

Fig. 8. Relationship between preset delay and measurement delay. (a) Overall diagram; (b) local enlarged diagram

Fig. 9. Comparison of measurement errors obtained by threshold method and constant ratio timing method

Fig. 10. Response time of optical switch. (a) Response time of optical switch 1 in direct state; (b) response time of 17 optical switches in different states