NAOJ GW Elog Logbook

Measurement analysis

I did some analysis on the last absorption measurements (entry 279).

X, Y: output signal from Lock-in Amp.

I fitted the histograms of X and Y signals with gaussian. For raw data and for filtered data.

I calculated the precision of the measurement as std(sqrt( (X-Xo)^2 + (Y-Yo)^2 )) and used the calibration to get the ppm/cm

2016-07-20. Tama-size , 1h, rate: 100ms.

DATE 2016-07-20	DC		X/DC*1e6		X/DC*1e6 gauss.fit		Y/DC*1e6		Y/DC*1e6 gauss.fit		sqrt(meanX/DC^2+meanY/DC^2)*1e6	Absorption ppm/cm		phase
Pump	mean	std	mean	std	fit_mean	fit_std	mean	std	fit_mean	fit_std		mean	precision	mean	std
0W	6.5 V	0.11%	0.04	12.1	0.08	11.2	0.64	12.0	0.59	11.9	0.64	6.8	7.9	-178°	131°
9W	6.6 V	0.15%	-9.2	13.7	-9.0	11.3	0.34	13.5	0.40	11.4	9.2	6.8	7.9	-178°	131°

2016-07-21. Tama-size , 1h, rate: 100ms

DATE 2016-07-21	DC		X/DC*1e6		X/DC*1e6 gauss.fit		Y/DC*1e6		Y/DC*1e6 gauss.fit		sqrt(meanX/DC^2+meanY/DC^2)*1e6	Absorption ppm/cm		phase
Pump	mean	std	mean	std	fit_mean	fit_std	mean	std	fit_mean	fit_std		mean	precision	mean	std
0W	6.5 V	0.11%	-0.40	11.8	-0.44	11.7	0.26	12.1	0.16	12.1	0.48	6.1	6.7	-105°	104°
9W	6.6 V	0.15%	-2.6	13.6	-3.4	13.1	-7.6	12.9	-7.4	12.4	8.2	6.1	6.7	-105°	104°

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After average filtering, filter order: 600 (1min)

2016-07-20.

DATE 2016-07-20	DC		X/DC*1e6		X/DC*1e6 gauss.fit		Y/DC*1e6		Y/DC*1e6 gauss.fit		sqrt(meanX/DC^2+meanY/DC^2)*1e6	Absorption ppm/cm		phase
Pump	mean	std	mean	std	fit_mean	fit_std	mean	std	fit_mean	fit_std		mean	precision	mean	std
0W	6.5 V	0.11%	0.05	1.5	0.005	1.6	0.6	1.2	0.72	1.25	0.65	6.8	1.3	-178°	167°
9W	6.6 V	0.15%	-9.1	1.9	-9	2	0.34	1.9	0.5	1.9	9.16	6.8	1.3	-178°	167°

2016-07-21.

DATE 2016-07-21	DC		X/DC		X/DC gauss.fit		Y/DC		Y/DC gauss.fit		sqrt(meanX/DC^2+meanY/DC^2)*1e6	Absorption ppm/cm		phase
Pump	mean	std	mean	std	fit_mean	fit_std	mean	std	fit_mean	fit_std		mean	precision	mean	std
0W	6.5 V	0.11%	-0.4	1.3	-0.4	1.3	0.25	1.25	0.3	1.25	0.4	6.1	1.8	-105°	24°
9W	6.6 V	0.15%	-2.6	3.4	-2.8	3.4	-7.5	3.17	-6.8	3.4	8.15	6.1	1.8	-105°	24°