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← TechnologyWhich 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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