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Which risk increases when a gallium arsenide (GaAs) semiconductor laser's pulsed operation frequency rises excessively, approaching material limits?

A)Chromatic dispersion dominates signal weakening
B)Electron velocity saturation risks burnout
C)Phonon bottlenecking impairs pulsed extinction
D)Material defects initiate avalanche breakdown

💡 Explanation

Electron velocity saturation increases failure risk because mobile charges cannot accelerate infinitely; the drift velocity approaches a maximum, increasing heat generation therefore potentially damaging or melting the crystal lattice, rather than other frequency-dependent effects like dispersion.

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