Sample interview questions: What are some common techniques for achieving high-repetition-rate laser pulses?
Sample answer:
- Mode-locking Techniques:
- Employing active mode-locking methods like Kerr-lens mode-locking, synchronous pumping, or semiconductor saturable absorber mirrors.
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Implementing passive mode-locking techniques, such as colliding-pulse mode-locking, nonlinear polarization rotation, or saturable absorbers.
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Q-Switching Techniques:
- Utilizing active Q-switching methods, such as acousto-optic, electro-optic, or mechanical Q-switches.
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Implementing passive Q-switching techniques, including saturable absorbers, nonlinear absorbers, or dye solutions.
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Gain Switching:
- Exploiting the gain saturation of the laser medium to achieve short pulses at high repetition rates.
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Employing high-gain laser media with fast upper-state relaxation times.
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Injection Seeding:
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Employing an external, synchronized seed laser to modulate the gain profile of the main amplifier and generate high-repetition-rate pulses.
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Direct Amplification:
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Utilizing ultrafast amplifiers, such as regenerative amplifiers or chirped pulse amplifiers, t… Read full answer