BWT, e thehiloeng ka 2003, e ikemiseditse ho "tloha toro ho khantša leseli", pono ea ho ba "moeta-pele oa lefats'e oa litharollo tsa laser", le boleng ba "boqapi bo ikhethang", ho fana ka laser diode, fiber laser, Lihlahisoa tsa laser tse potlakileng haholo le tharollo ho bareki ba lefats'e.