Figure 3
From: Quantum Coherent Feedback Control for Generation System of Optical Entangled State
Experimental setup of manipulating and enhancing the EPR entangled states with the CFC loop.
Laser: Nd: YAP/LBO laser source; MC1: Mode cleaner of 1080 nm; MC2: Mode cleaner of 540 nm; HWP1-4: λ/2 waveplate; PBS1-3: Polarizing beam splitter; ISO: Isolator; PZT1-6: Piezoelectric transducer; BHD1-2: Balanced homodyne detector ; SA: Spectrum analyzer.
