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← ScienceWhich consequence results when optical feedback exceeds threshold within a laser?
A)Mode locking produces short bursts✓
B)Quenching ceases stimulated emission
C)Population inversion becomes more stable
D)Gain medium refractive index stabilizes
💡 Explanation
Mode locking in lasers results from excessive optical feedback; the constructive interference of recurring pulses creates ultrashort pulses of light because the laser's cavity reinforces specific frequencies rather than others. Therefore mode locking creates ultra short pulses rather than quenching, population inversion or index stabilizing.
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