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AdV-PSL (Laser Bench setup)
Cleva, Kefelian - 9:01 Monday 18 June 2018 (41873) Print this report
neoVAN optimisation

!!! I ve checked that PD_PMC_REF is well centered !!!
AOM disconnected

d (m)    P_M9(W)    TEM02_V    TEM02_%    TEM00_OR(V)    C_R        TEM00_R    PMC_TRA(W)   Comment
0,64    89.0    0.020    0.5%    3.45        0.156    0.56    66.2    Step180613_1
0,62    90.3    < 0.02     0%        3.46        0.150    0.52    67.8    Step180613_2
0.60    89.2    <0.02    0%        3.42        0.155    0.53    65.9    Step180613_3
-> seems d=0,62 m is optimum

0.60    93.2    0.050    1.4%    3.54        0.169    0.65    68.3    Step180613_4
0.62    90.7    x        x        x            x        x        x        Step180613_5
0.62    95.1    0.180    5        3.58        0.179    0.820     63.5    Step180613_6
0.62    90.6    < 0.02    0        3.40        0.158    0.540    65.7    Step180613_7
0.62    89.1    x        x        x            x        x        66.3     Step180613_8
0.60    89.4    < 0.02    0        3.425        0.147    0.504    67.2    Step180613_10
-> seems d=0,60 m is better than 0,62 !... and we can't recover what we got in Step180613_2 (see Step180613_7)
--> we stick to d = 0,60 m


# Play with different pump
0.60    x        x        x        x            x        x        69.1    Step180613_11
0.60    x        x        x        x            x        x        68.5    Step180613_12
0.60    x        x        x        x            x        x        68.9    Step180613_13
0.60    x        x        x        x            x        x        69.1    Step180613_14
0.60    x        x        x        x            x        x        67.0    Step180613_15
0.60    x        x        x        x            x        x        69.4    Step180613_16
0.60    x        x        x        x            x        x        69.9    Step180613_16_bis
0.60    93.0    0.06     1.68%    3.56        0.620    0.157    70.2    Step180613_17
0.60    x        x        x        x            x        x        68.4    Step180613_18
0.60    x        x        x        x            x        x        69.9    Step180613_19
-> seems Step180613_17 is the best config

!! the meas. of the TEM02 mode is missing... should be done any time later
This may sligthly change the conclusion on the most efficient pumping configuration
indeed:

  • we expect Step180613_12 to lead to 5% would lead to 72 W assuming TEM02 is cured (same config as Step180613_4)
  • Step180613_17 should present even more TEM02 (TBC) since the pump config is unbalanced is worsen (4,5/5,5 A) could lead to 73,7 W assuming TEM02 is cured. Again: To Be Checked


Legend:
d: dist(LB_L5-neoVAN input side)
Step180613_1: 4.2/5.3
Step180613_2: 4.2/5.3    
Step180613_3: 4.2/5.3
Step180613_4: 4.7/5.3 Pgoes to 94.2 W after 30'
Step180613_5: 4.2/5.3 for a double check
Step180613_6: 4.7/5.3
Step180613_7: 4.2/5.3
Step180613_8: 4.2/5.3 before moving to 0,60 for double check that this is the optimum
Step180613_9: 4.2/5.3
Step180613_10: 4.2/5.3
Step180613_11: 4.5/5.3
Step180613_12: 4.7/5.3
Step180614_13: 4.6/5.3
Step180615_14: 4.4/5.3
Step180615_15: 4.5/5.1
Step180615_16: 4.5/5.4
Step180615_16_bis: 10' later after realign
Step180615_17: 4.5/5.5 (by the way, we got also 67.5 with AOM), 18:00 LT
Step180615_18: 4.6/5.6
Step180615_19: 4.4/5.4

--> we choose the config Step180615_17 from now

it leads to  70,2 W at PMC_TRA with the AOM disconnected

it leads to 67,5 W at PMC_TRA with the AOM back connected

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