around the exterior of housing 55 of the motor portion 57 of esp assembly 53 referring to fig8 in an additional alternate embodiment a fiber optic cable 61 is run through a slot 63 in an outer periphery of a stator lamination 65 as found within a motor portion of an esp assembly thus forming a stack of laminations 65 and aligning the slot 63 forms a stator with an elongated groove in which the fiber optic cable 61 can be disposed in an alternate embodiment the fiber optic cable 61 may also be rigidly connected to the interior surface of the motor housing 24 in additional alternate embodiments slots could also be placed in various elements of an esp assembly for example in a particular alternate embodiment illustrated in fig9 a centrifugal pump 67 has a housing 69 that protects many of the pump 67 components pump 67 contains a shaft 71 that extends longitudinally through the pump 67 diffusers 73 have an inner portion with a bore 75 through which shaft 71 extends each diffuser 73 contains a plurality of passages 79 that extend through the diffuser 73 each passage 79 is defined by vanes not shown that extend helically outward from a central area diffuser 73 is a radial flow type with passages 79 extending in a radial plane an impeller 81 is placed within each diffuser 73 impeller.