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Power measurement 18Fev

Power measurement 18Fev.  Power measurement on the full optical chain to understand degradation. On fast monitoring: power = - 8% in 2013. Power measurement 18Fev. 20 Sept : (new DP2 optical path). DP2. P0 = 40 mW@45 A (73mW@55A). 1x 100. Coupling+ att. Att. box. 1X5. DP2.

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Power measurement 18Fev

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  1. Power measurement 18Fev  Power measurement on the full optical chain to understand degradation On fast monitoring: power = - 8% in 2013

  2. Power measurement 18Fev 20 Sept:(new DP2 optical path) DP2 P0 = 40 mW@45 A (73mW@55A) 1x 100 Coupling+ att. Att. box 1X5 DP2 IL (ch99) = 12db 2.5 mW Ch.99 27 April: IL(ch1) = 12.5 dB for DP2 (done at 55A) 18Fev: P0 = 40 mW@45 A (73mW@55A) Laser itself unchanged. First measurement: IL(ch99) = -12.7 dB ; IL(ch1) = -13.5 dB  +-1 dB extra Second measurement : After cleaning 1x5 switch fibre (higher attenuation here) and tuning the XYZ mount of the main fibre: IL(ch1) = -12.6 dB  Same as April 2012.

  3. Power measurement 18Fev Detail of the Measurement, 18 Fev: IL (dB) Main fibre 20m Test fibre 40 mW Coupling+ att. 4.2 dB (was 2.56 in Sept), too high DP2 15.5 mW 1 Test fibre 6.4dB 1X5 Coupling+ att. DP2 2 9.3 mW 10dB Coupling+ att. Att. box 1X5 DP2 3.9 mW 3 1x 100 Coupling+ att. Att. box 1X5 DP2 IL(ch1) 13.5 dB 1.8mW 4 Ch.1 1m fibre Coupling+ att. DP2 27.4 mW 1.6 dB after optimize XYZ mount Before : 1.95 dB 5 Test fibre Coupling+ att. DP2 20.4 mW 2.9dB. Cleanning fibre 1x5 6 1x 100 Coupling+ att. Att. box 1X5 DP2 2.2mW 7 IL(ch1) 12.6dB

  4. Power measurement 18Fev Results : Recover 1 dB extra lost since Sept. by optimizing the XYZ coupling + cleaning 1 connector. Waiting Matacq plots to see effect.

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