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← ScienceWhich outcome temporarily disables a free-space optical communication link, if laser coherence declines?
A)Increased bit-error rate occurs✓
B)Signal strength remains unaffected
C)Bandwidth instantaneously expands tenfold
D)Reduced atmospheric turbulence compensation
💡 Explanation
Increased bit error rate results because reduced constructive and destructive interference degrades the signal; the mechanism is called modal dispersion. Therefore the optical link suffers errors rather than functioning normally given the decreased laser coherence because the intended diffraction patterns are disrupted.
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