Two thin-clad laser diodes are disposed to form a stack-type device that emits
two beams. The beams are substantially parallel and in proximity such that they
share many fiberoptic systems designed for a single beam. In one embodiment the
device functions as a dual-wavelength fiber-pigtailed light source. In another
embodiment a feedback mechanism is provided to couple the diodes. Other embodiments
include structures and methods for output power enhancement and tunable lasers.
