Spinning rotor for an open end rotor spinning machine comprising a rotor shaft, a rotor cup, which has an opening, an inner chamber, a rotor groove, a conically widening slide wall extending from the opening to the rotor groove and a rotor base arranged opposing the opening and designed with a bore, through which the rotor shaft extends at least partially. The broadband optical limiter includes a plurality of graphene nano-sheets, and a base material in which the plurality of graphene nano-sheets is distributed. An electrical generator is coupled to the object and is configured for generating electricity upon translation of the object.