An apparatus and method for conducting resistivity logging in a borehole. First, a three-layer aluminum alloy plate having a core made of AlMn alloy, a sacrifice anode layer made of aluminum alloy which is electro-chemically base with respect to the core and clad on one side of the core, and a brazing layer made of AlSi alloy and clad on the other side of the core is uniformly rolled to be work-hardened. A first light emitter is bonded onto the conductive submount substrate by a metal layer. A third photodiode receives light that has been caused to interfere by an interferometric device. The server can separately monitor for messages having a particular message classification and can process the messages accordingly.