Which risk increases significantly when a pulsed laser's mode mismatch exceeds tolerances within a Ti:sapphire regenerative amplifier?

💡 Explanation

Increased thermal lens aberrations become critical because excessive mode mismatch causes non-uniform heating of the Ti:sapphire crystal, resulting in a stronger, distorted thermal lens due to absorbed laser power. Therefore, beam quality degrades, rather than other straightforward stimulated emission effects.

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