A hybrid interferometric system for velocity measurements in shock-wave experiments

Area of Science:

• * Experimental Physics
• * Optical Metrology
• * Materials Science

Background:

• * Accurate surface velocity measurement is critical for understanding material behavior under dynamic conditions, such as shock-wave loading.
• * Existing interferometric techniques like AFVISAR and PDV offer high-resolution velocity measurements but often require separate systems.
• * Integrating multiple interferometric methods can enhance data acquisition and analysis in complex dynamic experiments.

Purpose of the Study:

• * To present a novel hybrid interferometric system integrating AFVISAR and PDV.
• * To enable simultaneous measurement of surface velocity using two independent interferometric channels from a single probing system.
• * To validate the system's performance in shock-wave experiments.

Main Methods:

• * Development of a hybrid system combining All-Fiber Velocity Interferometer System for Any Reflector (AFVISAR) and Photonic Doppler Velocimeter (PDV) channels.
• * Utilization of a single probing system to capture the optical signal containing Doppler frequency shifts.
• * Independent processing of the same optical signal by both AFVISAR and PDV interferometric devices.

Main Results:

• * Successful integration and testing of the hybrid interferometric system in dynamic experiments.
• * Achieved velocity measurement accuracy of at least 1.5 m/s.
• * Demonstrated nanosecond time resolution for surface velocity measurements.

Conclusions:

• * The hybrid AFVISAR-PDV system offers a robust and accurate method for surface velocity measurement in shock-wave experiments.
• * The integrated design simplifies experimental setup while maintaining high measurement fidelity.
• * The system provides valuable data for materials science research under extreme dynamic loading conditions.