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Which risk increases significantly when using misaligned polarizing filters targeting a laser beam's minimum transmission?

A)Increased material optical birefringence
B)Harmonic signal frequency instability
C)Optical power back-reflection increase
D)Elevated filter substrate thermal loading

💡 Explanation

Excessive substrate heating may lead to thermal runaway and system failure; therefore, understanding this risk is essential; it occurs because suboptimal alignment leads to unexpected transmission, and **absorption**, rather than complete blockage. Because of this more energy gets absorbed in the filter rather than reduced transmission, because of cross polarization.

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