Loss in a Fiber System

Loss in a Fiber System

So its a big question when taking measurements what loss i should see when measuring a loss in a connector or a Fiber optic slipring below are some ballpark figures which will help you out in a field.

Fiber cable- 0.4dB/Km - 0.7dB/Km

Slip-Ring/FORJ - As depending on which channel of fiber optic slip ring you are using loss will be considered if we consider a 5 channel slipping and loss will be minimum in channel no-1 and maximum loss will be in channel no 5.

Channel no # 1 - 2 dB
Channel no # 2 - 2.5 dB
Channel no # 3 - 3 dB
Channel no # 4 - 3.5 dB
Channel no # 5 - 4 dB

Connector -0.25 dB

Barrel or Union Connector- 0.5 dB-1 dB

I have calculated on papers with 4km of umbilical and 600 mt of tether taking in consideration all connectors, The maximum and minimum loss in a system should be

ROV                                                                              
Maximum Loss-16dB
Minimum Loss-11dB

CAGE/TMS
Maximum Loss -12dB
Minimum Loss - 7 dB

You have all the figures you can calculate on your own by taking all the connectors in consideration.