An electrically-powered device assembly in which input energy is used to excite a diode to emit a low-power and/or high-power therapeutic laser beam intended for ophthalmic surgery (e.g., ocular incisions, ocular photocoagulation, iridectomy, vitrectomy). Some types may also include an air pump to disperse subretinal fluid in certain procedures (e.g. retinal detachment repair). The laser utilizes a diode/semiconductor chip (as the active medium); it does not include femtosecond pulsing, or fundus imaging technology.