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← ScienceWhich impairment occurs when pulsed laser diodes lose coherence?
A)Reduced signal-to-noise ratio✓
B)Decreased electrical conductivity
C)Increased thermal energy output
D)Elimination of quantum entanglement
💡 Explanation
Reduced signal-to-noise occurs because loss of coherence broadens the laser's spectral bandwidth, thereby reducing its effective power. This degrades the signal; therefore, resolution worsens rather than improving because spectral purity diminishes, not conductivity enhancement.
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