An internal laser module may be capable of providing a similar high performance as that provided by traditional internally cooled laser modules, but with improved cost efficiency and manufacturability. The subterranean oilfield sensor systems and methods facilitate downhole monitoring and high data transmission rates with power provided to at least one downhole device by a light source at the surface. The upper portion does not rotate with a steerable assembly while the lower portion does, with the upper portion including a lower surface adjacent to a seal opening. Furthermore, there are disclosed a corresponding mobility control unit, a corresponding communication unit as well as a corresponding mobility management adjustment system. M and N are positive integers and M is less than N.