Injection laser have a high threshold current density of __________

Injection laser have a high threshold current density of __________ Correct Answer 104Acm-2 and more

Injection laser have a high threshold current density of 104Acm-2due to lack of matter and in-efficient light sources. These high current densities are largely utilized in pulse mode in order to minimize junction and thus avert damage.

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The parameters having a major role in determining threshold current of efficiency of injection laser are ___________
Statement (I): Air-blast injection in diesel engines could reduce engine efficiency. Statement (II): Air-blast injection in diesel engine is not instantaneous but happens when the piston moves outward with the injection valve remaining open for whatever reason.