Fig. 8 | Light: Science & Applications

Fig. 8

From: Random optical parametric oscillator fibre sensor

Fig. 8

Low-bandwidth detection setup. a An alternative setup is proposed for the detection of R-OPO pulses with low-bandwidth components. b Two optical pulses arrive in a low-bandwidth photodetector (PD) in sequence, first a reference pulse, then a signal pulse. c By calibrating the intensity of signal pulses with that measured for reference pulses, a sinusoidal strain pattern is observed, matching with the applied strain variation

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