Fig. 2 Light-Current-Voltage (L-I-V) characteristic of an ICL
array with 3 emitters in CW operation at the heat sink temperature of
10oC.
Figure 3 compares the WPE versus current curves measured from a single
emitter and a three-emitter array at 10℃, respectively. The two curves
overlap when the injection current densities are lower than 500
A/cm2, and deviate slightly as the current density
increases. For the single emitter sample, the maximum WPE and the WPE at
the maximum current are 15% and 13.6%, respectively. These values are
only 0.6% higher than that of the 3-emitter array sample, indicating
efficient heat extraction from the