Extended Data Fig. 6: Measurement of the open loop transfer function of the homodyne locking loop around the squeezing frequency band. | Nature Physics

Extended Data Fig. 6: Measurement of the open loop transfer function of the homodyne locking loop around the squeezing frequency band.

From: Room-temperature optomechanical squeezing

Extended Data Fig. 6

Since this loop is designed only to suppress large path length fluctuations between the local oscillator and the signal at low frequencies (< 1 kHz), this loop has close to zero gain at our measurement frequencies.

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