I have worked out the fibers we need to get for the following distribution scheme:
1) We have a laser placed at the 1Y1 rack. A part of the power is split off for monitoring the laser output and sent to a broadband PD also placed in the same rack. The RF excitation applied to the laser is split and sent to LSC rack (1Y2) and used to calibrate the full PD+Demod board system for each RFPD.
2) A single fiber goes from the laser to a 11+ way switch located in the OMC electronics cabinet next to the AP table. From here the fibers branch out to three different tables.
| Table / Rack |
RF PDs on the table |
Number of PDs |
Fiber Length from OMC |
| The AP table |
AS11,AS55,AS165,REFL11,REFL33,REFL55,REFL165 |
7 |
6 m |
| The ITMY table |
POY11 |
1 |
12 m |
| The ITMX table |
POX11, POP22/110 and POP55 |
3 |
20 m |
Cable for the laser source to the OMC table:
| The 1Y1 Rack to OMC rack |
AM Laser Source to Switch |
25 m |
We also require a cable going from PSL table to the ETMY table: This is not a part of the RFPD characterisation. It is a part of the PSL to Y-end Aux laser lock which is a part of the green locking scheme. But it is fiber we need and might as well order it now along with the rest.
| PSL Table to ETMY Table |
PSL to ETMY Aux laser |
75m |
If you would like to add anything to this layout / scheme, please comment. On Monday Eric is going to take a look at this and place orders for the fibers.
(I have included the lengths required for routing the fibers and added another 20% to that )
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