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Cavity Dumping in Lasers

Cavity Dumping for Nanosecond Pulses

Cavity dumping is a technique used in lasers for generating intense light pulses. In this method, an optical switch called a “cavity dumper” is employed to extract the built-up pulse from the laser resonator. This process is beneficial for overcoming limitations associated with Q-switching, particularly in terms of achieving shorter pulse durations at higher repetition rates.

Cavity Dumping for Ultrashort Pulses

In the case of ultrashort pulses, cavity dumping is utilized in mode-locked lasers to generate pulses with higher energies. By keeping resonator losses low, an intense pulse can be formed and extracted using a high-speed optical switch. This approach allows for the generation of pulses with significantly higher energies compared to traditional mode-locked lasers.

Nonlinear Cavity Dumping

Another method of cavity dumping involves using a nonlinear crystal within the laser resonator. By introducing pulses from a Q-switched laser into the crystal, energy can be extracted in the form of short pulses at a specific frequency. This technique offers a different approach to cavity dumping and can provide unique advantages in certain laser systems.

Conclusion

Cavity dumping is a versatile technique that finds applications in both nanosecond and ultrashort pulse lasers. By effectively extracting built-up energy from the laser resonator, it enables the generation of high-intensity pulses with precise control over pulse duration and repetition rate.

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