Fig. 5: Measurement results of bright squeezed light at 1 mW with nonclassical hybrid passive–active stabilizations. | Light: Science & Applications

Fig. 5: Measurement results of bright squeezed light at 1 mW with nonclassical hybrid passive–active stabilizations.

From: Bright squeezed light in the kilohertz frequency band

Fig. 5

Trace (a): measured technical noise of the free-running laser. Trace (b): measured RSN of the 1 mW optical power detected by ool-PD. Trace (c): theoretical shot noise at 1 mW. Trace (d): measured noise variance of the bright squeezed light. Trace (e): simulated noise variance of the squeezed light. Trace (f): quantum noise coupled through the in-loop empty port of the VBS. Trace (g): sum of the electronic noise of the two photodetectors. Trace (h): residual technical noise of the in-loop under hybrid stabilizations. Trace (i): uncorrelated sum of the noise sources (e)–(h). All measurements were performed using a spectrum analyzer (R&S FSW) at two frequency bands, 1–100 kHz and 100 kHz–1 MHz, with a RBW of 100 Hz and a VBW of 10 Hz

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