Appendix III
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Back compartment of the
femto
FBG
Behind the imaging/focusing section of the femtoFBG, there is a compartment used to
store cables and several electronic devices. An image of this space is shown in Figure 53.
Figure 53. Back compartment of the femtoFBG.
A USB hub (1) is used in this compartment to receive the ends of all
femto
FBG devices
which are USB controlled. In Figure 53 the power cord and the cable connecting it to the
laptop have been removed for viewing clarity. The photodiode used to monitor the
amount of laser average power in the
femto
FBG has is cable ending in this compartment
(2). The controller (3) for the two LEDs used in the femtoFBG is in this compartment
also. The long cable used to connect the rotational stage of the femtoFBG variable power
attenuator to the XPS controller (4) is wrapped and store in this compartment.