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Comparison of simulation tools for LCGT

I am comparing several simulation tools with theoretical line using LCGT 2007 parameters. I used here FINESSE, Thomas, Oprickle. Except for FINESSE, all results matched pretty well within 0.1%-1% accuracy. FINESSE seems to have a bug of a factor by sqrt(2), but it can be compensated later if you know this information.

• Theoretical: just analytical way shown in LCGT document on page xx.
• FINESSE: Developped by Andreas Freise. C based. 'ps2S' and 'scale meter' commands are used for the unit in m/rHz and 'fig' command are used to produce excitations in frequency domain. Compensation factor *sqrt(2) was needed to match other results. This could be a bug.
• Thomas: Developped by Thomas Cobit. Visual C++ besed, running only Windows machine. This is the first simulation tool which can calculate quantum effect using two-photon mode.
• Optickle: Developped by Matt Evans. Matlab based, very flexible simulation tool. You can use a full set of Matlab functions. This tool also can calculate full quantum effect.

FPMI, no loss case for LCGT parameters

20090709_simall_FPMI_noloss.zip

For shotnoise calculation here, just very hevy masses are used in Thomas tool and Optickle.

PRFPMI, no loss case for LCGT parameters

20090709_simall_PRFPMI_noloss.zip

BRSE, no loss case for LCGT parameters

20090709_simall_BRSE_noloss.zip

BRSE, no loss case with radiation pressure noise for LCGT parameters

20090709_simall_BRSE_noloss_rad.zip

Optickle uses vacuum injections from dark port and other lossy ports on this model due to introduce quantum noise, so Optickle result with RF detection is worse than other calculation like Thomas's DC readout. Calculation above this model assumed ideal flat shot noise, so all the results were matched well.

BRSE, with loss, radiation pressure noise for LCGT parameters

20090709_simall_BRSE_loss_rad.zip