A glass-ceramic rare earth doped fiber comprises a plurality of crystallites, wherein at least 90% of the rare earth dopant is situated within said crystallites. Abnormality of a steering assist command value is detected by employing a dual detection configuration of a main ECU clip and a sub ECU interlock. When the cooling system is employed to cool the one or more electronic devices and the first fluid boils, evolving first fluid vapor condenses in situ by direct contact with the second fluid of higher boiling point temperature. On the receive side, an impedance matching circuit is coupled to the input of a programmable gain amplifier.