Figure 38

Figure 38: Left: Numerically-optimized filter-cavity parameters for a single cavity based pre- and post-filtering schemes: half-bandwidth γf1 (solid lines) and detuning δf (dashed lines), normalized by γf0 [see Eq. (442View Equation)], as functions of the filter cavity specific losses Af ∕Lf. Right: the corresponding optimal SNRs, normalized by the SNR for the ordinary interferometer [see Eq. (455View Equation)]. Dashed lines: the normalized SNRs for the ideal frequency-dependent squeeze and homodyne angle cases, see Eqs. (403View Equation) and (408View Equation). ‘Ordinary squeezing’: frequency-independent 10 dB squeezing with 𝜃 = 0. In all cases, J = JaLIGO, γ = 2π × 500 s−1, and ηd = 0.95.