Which effect results when a fiber laser's pump power fluctuates at high frequency?

A)Increased spectral linewidth✓

B)Reduced thermal lensing

C)Higher beam quality factor

D)Enhanced mode-locking stability

💡 Explanation

Increased spectral linewidth occurs because pump power fluctuation causes transient changes in the gain medium's refractive index, altering the optical path and resulting in frequency chirp via the mechanism of amplified spontaneous emission; therefore linewidth broadens rather than maintains stability like mode-locking could under steady pumping.

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Which effect results when a fiber laser's pump power fluctuates at high frequency?

💡 Explanation

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