Which risk increases when a semiconductor laser's power supply current exceeds the threshold?

💡 Explanation

Exceeding threshold current leads to excessive optical power density at the laser facet; this induces bond breakage via **photochemical etching**, because optical energy promotes reactions therefore accelerating degradation; rather than increased emission or carrier stagnation under higher density.

• Which outcome occurs when the expansion valve fails closed in a refrigeration system with a positive displacement pump?
• Which risk increases when de-icing fluid becomes too dilute before flight?
• Which vulnerability emerges when a software-defined radio receives intentionally distorted quadrature amplitude modulation (QAM) signals?
• Which mechanism limits the maximum load-bearing capacity of a pre-stressed concrete beam?
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• Which deformation results when chatter occurs during lathe cutting?