An optical fiber splice device in which an optical fiber can be connected to a branch line side thereof as the need arises such as in the case where new subscribers join after a multiple optical fiber is connected to a trunk line side thereof. A further cell design for systems of mediated electrochemical oxidation included conduits for connecting plural catholyte chambers or for connecting plural anolyte chambers which are embedded within walls of a molded unibody constructed box and slots for parallel arrangement of membranes and porous electrodes. A flow modifier is positioned within the exhaust conduit and comprises a plate including a plurality of bores spaced apart from one another and positioned about a periphery of the plate. Further, in addition to above structure, the power source supply line may be arranged in a matrix. This may be accomplished by running each lead directly away from the microfluidic complex, through a thermally isolating substrate. Accordingly, the low power potential can follow the high power potential, that is a high power potential of the light emitting element.