Abstract
We propose a simple and powerful criterion for defining continuous-wave (CW) operation of laser diodes. Our criterion is represented by a quasi-triangular region in the plain spanned by dimensionless parameters /spl alpha/ and /spl beta/. These parameters, deduced from the characteristics of the laser diode operating under pulsed current injection, represent the effects of the turn-on voltage and the series resistance on the increase in the CW threshold. We demonstrate the validity of our criterion using blue-green lasers made from II-VI semiconductors as examples.
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