Fig. 3: Demonstration of tunable quantum noise spectrum in white light signal recycling interferometer. | Communications Physics

Fig. 3: Demonstration of tunable quantum noise spectrum in white light signal recycling interferometer.

From: Gravitational wave detectors with broadband high frequency sensitivity

Fig. 3

Adjustment of the quantum noise curve is achieved by changing the filter cavity pump power Ppump relative to Pf, which is the power required to achieve negative dispersion as per Eq. (3). This is useful for tuning the location of peak sensitivity in the neutron star detection band without changing interferometer hardware or detuning the signal recycling cavity.

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