1. PPM-DU (WORKING DOCUMENT, DO NOT PUBLISH) A three DOM Detection Unit in place of an Antares string. Nikhef for KM3NeT: PPM-DU optical network DRAFT!, designed by Nikhef Optical team. 2012-11-08

2. λ1λ1 λ2λ2 λ 2 LiNbO3 PPM-DU: Network layout 5) less straight forward approach, 1 SC modulator λ4λ4λ6λ6 50/50? A1 REAM 2xCu DOM1 PIN λ2λ2 C2 A2 High attn = OFF Low attn = ON (callibrated) 20/80 DOM2 DOM3 REAM 2xCu PIN λ6λ6 REAM 2xCu PIN λ4λ4 90/10? Infra SC C2 Infra SC 50/50? D1 LiNbO3 Xx dB Junction Box λ3λ3 λ8λ8 λ8λ8 λ1λ1 ?? λ1λ1 λ3λ3 λ5λ5 λ9λ9 λ10 λ9λ9 λ2λ2 λ4λ4 λ6λ6 DRAFT! D2 VOA manual 6 λ laser- bank 3x λ 4 λ 6 λ 1 λ 3 λ 5 VOA RS-232 D1 (MUX) connections. D2 (DEMUX) connections.Infrastructure Slow Control Ch nr.FuntionWavelength (nm)ITU ch. Ch nr.FuntionWavelength (nm)ITU ch.Ch nr.FuntionWavelength (nm)ITU ch. 1SC DOM 11554.9428 1n.c.1554.94289Infra SC downstream1564.6816 2 CW DOM 11555.7527 2 CW DOM 11555.752710Infra SC upstream1563.8617 3SC DOM 21556.5526 3n.c.1556.5526 4 CW DOM 21557.3625 4 CW DOM 21557.3625 5SC DOM 31558.1724 5n.c.1558.1724 6 CW DOM 31558.9823 6 CW DOM 31558.9823 7n.c.1559.7922 7n.c.1559.7922 8n.c.1560.6121 8n.c.1560.6121 DU-container Shore station ?

3. Nikhef for KM3NeT: PPM-DU optical network DRAFT!, designed by Nikhef Optical team. 2012-11-08 Shore station receiver options Photline APD(3x) crate D2 λ2λ2λ4λ4λ6λ6 Electrical switch Crate (SMA)* *The electrical switch crate switches between: Receiver output <> electrical SS crate Receiver output <> Timing mode structure Selects one of the Receiver outputs for timing measurement APD SFP optical Rx SFP SMA SFP interconnect 3x *Manual rerouting the fiber to a suitable receiver for timing measurement. * * * SFP optical Rx SFP SMA SFP interconnect 3x * * * D2 Suitable Receiver. 1 2 3

4. Infrastructure Slow Control Nikhef for KM3NeT: PPM-DU optical network DRAFT!, designed by Nikhef Optical team. 2012-11-08 Ethernet <> Fiber (sfp)Fiber(sfp) <>Ethernet Ethernet switch (4 port) NE-4110S λ9λ9 λ10 SFP module: λ j ust out of C-band for future use. Are add/drop available for this λ? Infrastructure Slow Control Ch nr.FuntionWavelength (nm)ITU ch. 9Infra SC downstream1564.6816 10Infra SC upstream1563.8617 Spare ethernet Ethernet to 1 x RS-232 EDFA A2 (True RS232) Ethernet to 1 x RS-232 Digi. VOA (True RS232?) Ethernet to 1 x RS-232 EDFA A2 (True RS232) Ethernet to 1 x RS-232 spare Ethernet to 1 x RS-232 Or ethernet AC/DC conv (True RS232 or ttl?)

5. Ethernet <> Fiber (sfp)Fiber(sfp) <>Ethernet Gbe switch (5port) Ethernet to 1 x RS-232 1x spare TTL serial Ethernet to 1 x RS-232 1x spare TTL serial Ethernet to 1 x RS-232 1x spare TTL serial Ethernet to Spare 1x RS-232 1x TTL serial Ethernet to 1 x RS-232 AC/DC conv (True RS232 or ttl?) EDFA A2 True RS232 Digital Con- trollable VOA (True RS232?) EDFA A1 True RS232 AC/DC Converter monitoring (True RS232 or ttl?) ??? PC/laptop RJ45 2x Optical LC RJ45 IDC DB9* ??? IDC? Mating cable ?? *DB9 is only used in the test bench. When installing in DU-container IDC will be used. A1 A2 Nikhef for KM3NeT: PPM-DU optical network DRAFT!, designed by Nikhef Optical team. 2012-11-08 Optional + +

6. Nikhef for KM3NeT: PPM-DU optical network DRAFT!, designed by Nikhef Optical team. 2012-11-08 ProCon +No wavelength dependend components in DOM-A1 needs to amplify CW and modulated data (needs to be tested) +Separate infrastructure Slow Control-More fiber from VEOC to DU foot. +If broadcast for three DOMs doesn’t work a point to point connection-Very few similarities with the final network for KM3NeT connection is still possible (only shore station needs to be upgraded)-Timing loop problems not solved yet (no test time) -Pin DIODE's need extra attenuation to protect it from high power of EDFA A1