Ning He, Xianghong Luo, Zhonghua Zhao, Xin Liao. Nondestructive Testing Method Based on Fiber Coupling and Coherent Detection[J]. Acta Optica Sinica, 2017, 37(8): 0812006
- Acta Optica Sinica
- Vol. 37, Issue 8, 0812006 (2017)
Fig. 1. Schematic of laser ultrasonic nondestructive testing
Fig. 2. Schematic of balanced detection system
Fig. 3. Signal-to-noise ratio simulations under balanced detection and common coherence detection
Fig. 4. General block diagram of experimental system
Fig. 5. Display interface of laser ultrasonic signal detection system
Fig. 6. Experimental testing platform for laser ultrasonic induction and optical coherent detection
Fig. 7. Background noise comparison. (a) Common detection; (b) balanced detection
Fig. 8. Waveforms obtained from laser ultrasonic detection system. (a) Common detection; (b) balanced detection
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