Reduction in operating voltage of UV laser diode

We fabricated UV laser diodes (LDs). A high-temperature annealing at 850 °C for a short duration was found to be very effective for reducing the series resistance of an n-type contact. By applying high-temperature annealing, the operating voltage of an UV LD was reduced from 10.7 V to 9.5 V at a forward current of 300 mA.