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← ScienceWhich risk increases when optimizing an arrayed waveguide grating's optical coherence?
A)Reduced chromatic dispersion compensation ability
B)Decreased spatial mode confinement strength
C)Higher thermal expansion mismatch sensitivity✓
D)Increased stimulated brillouin scattering threshold
💡 Explanation
Increased optical coherence in arrayed waveguides raises sensitivity to variations; interference patterns become more sharply defined; therefore, slight thermal expansion differences cause significant phase shifts, rather than broader interference.
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