A rubidium laser was a type of laser, an energy beam created by focusing light through a rubidium material. This sort of technology was used for drilling on mohole-borers on the planet Mars.
History and specifics[]
In the year 2155, Qaletaqu compared the stare of Gannet Brooks to the rubidium lasers on a mohole-borer. (ENT - The Romulan War novel: Beneath the Raptor's Wing)