with laser diodes in quasi-continuous-wave operation.ĭifficulties with Continuous-wave Operation Relatively long pulses can be generated e.g.Gain-switched semiconductor lasers are suitable for nanosecond or picosecond pulses with relatively low energy (→ picosecond diode lasers).For higher pulse energies (roughly an order of magnitude more), one may use a cavity-dumped laser. Their pulse energies are generally quite small, and the pulse repetition rate is usually in the megahertz or gigahertz region. Ultrashort pulses with durations in the picosecond or femtosecond domain are usually generated with mode-locked lasers, which may be solid-state bulk lasers, fiber lasers or semiconductor lasers.copper vapor lasers) are also driven with current pulses and could normally not work in continuous-wave operation. nitrogen lasers) and metal vapor lasers (e.g. They are pumped with rather short electric pulses. Excimer lasers are used for generating intense nanosecond pulses in the ultraviolet spectral region.Some solid-state bulk lasers are pumped with flash lamps but not Q-switched in free-running mode (i.e., with pulsed pumping but no intracavity loss modulation), one obtains longer pulses and somewhat higher pulse energies.Most Q-switched lasers are solid-state bulk lasers, and some of them can achieve high pulse energies in the millijoule or even multi-joule region. Various types of actively or passively Q-switched lasers emit pulses in the nanosecond duration regime particularly compact microchip lasers can also generate sub-nanosecond pulses.The article on pulse generation describes more in detail the technical methods, whereas this article discusses some types of pulsed lasers: Depending on the pulse duration, pulse energy, pulse repetition rate and wavelength required, very different methods for pulse generation and very different types of pulsed lasers are used. The term is most commonly used for Q-switched lasers, which typically emit nanosecond pulses, but this article gives an overview of a wider range of pulse-generating lasers. Pulsed lasers are lasers which emit light not in a continuous mode, but rather in the form of optical pulses (light flashes). How to cite the article suggest additional literature Definition: lasers emitting light in the form of pulses
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