Naoki, Vicky
Took some sqz data today, with the improved ring heater configuration from last night (68236). All data taken with IFO in NLN_CAL_MEAS, with 1600 seconds (100avgs x 16s/avg) at each time.
- No sqz, start @ 1364180658
- FDS w/100uW trans @ 1364181299
- FIS w/100uW trans @ 1364182274
- adjusted sqz power from 100 uW trans --> 88 uW trans
- FDS w/88uW trans @ 1364183871
- FIS w/88uW trans @ 1364184419
- No sqz, end @ 1364185004
From Dhruva's calibration on 2/3/23, these opo pump powers correspond to:
88 uW ~~ NLG=13.2, or 15.6dB generated sqz.
100 uW ~~ NLG = 19.05, or 17.5dB generated sqz.
Measuring NLG (non-linear gain of sqzer) based on carrier/seed optical gain now, it is fairly consistent with above calibration (did not optimize opo temps here).
---> No opo pump, seed nominal = 0.92 (OPO_IR_PD_LF_OUT_DQ)
@ 88uW, max_ir = 8.8. NLG = 9.5 (=8.8/0.92), Gen SQZ = 14.3 dB
@ 100uW, max_ir = 18. NLG = 19.5 (=18/0.92), Gen SQZ = 17.9 dB
DTT file with sqz data in: $(userapps)/sqz/h1/Templates/dtt/sqz_data_taking/darmFDS_032923_SQZDATA.xml
The attached figure shows the cleaned BNS range during this measurement (FDS/FIS with 88uW OPO trans). This plot shows how important our filter cavity is.
No sqz: 124 Mpc
FIS: 130 Mpc
FDS: 140 Mpc
Sorry, above GPS times were wrongly converted (my confusion between defaults being utc/pt..). Additionally, the times were not 1600s, they were 100 averages with 16s timespans, but with 75% overlap (oops!!). So, only around ~400-500 seconds for each dtt average (try 500?). Here should be the correct gpstimes at least, but we will likely need to get longer data stretches.
- No sqz, start @
1364180658.1364155458 - FDS w/100uW trans @
1364181299. 1364156099 - FIS w/100uW trans @
1364182274. 1364157074 - adjusted sqz pump power from 100 uW trans (~18dB gen sqz) --> 88 uW trans (~15dB gen sqz)
- FDS w/88uW trans @
1364183871. 1364158671 - FIS w/88uW trans @
1364184419. 1364159219 - No sqz, end @
1364185004. 1364159804