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Cw laser in optisystem how to#
Cw laser in optisystem full#

Particularly in cases with significant pulse pedestals, different methods can lead to substantially different pulse duration values.

Particularly in the context of laser-induced damage, one sometimes uses an effective pulse duration, which is defined as the pulse energy divided by the peak power.

Here, possible pedestals substantially increase the obtained pulse duration.

For complicated pulse profiles, a definition based on the second moment of the temporal intensity profile is more appropriate.

For calculations concerning soliton pulses, it is common to use a duration parameter τ which is approximately the FWHM duration divided by 1.76, because the temporal intensity profile can then be described as a constant times sech 2( t / τ).

This is not sensitive to some weak pedestals as often observed with light pulses.

Cw laser in optisystem full#

The most frequently used definition is based on the full width at half-maximum (FWHM) of the optical power versus time.There are actually different definitions of a pulse duration: Here is an overview on the common prefixes: High harmonic generation allows the formation of single attosecond pulses or attosecond pulse trains, with pulse durations of a few hundred attoseconds or even below 100 as.Mode-locked lasers can generate pulses with durations between ≈ 5 fs and hundreds of picoseconds.Pulse durations from Q-switched lasers typically vary between 100 ps and hundreds of nanoseconds.of laser diodes leads to pulses with durations down to a few nanoseconds or even to some hundred picoseconds.

By modulating a continuous-wave light source, e.g., with an electro-optic modulator, pulses with durations from some tens of picoseconds to arbitrarily high values can be generated.

The duration of light pulses (also called pulse width or pulse length) can vary in a huge range:

Cw laser in optisystem how to#

How to cite the article suggest additional literature Using our ad package, you can display your logo and further below your product description.Īsk RP Photonics for advice on which laser source is best suited for generating pulses with given parameters, or on how to characterize optical pulses.ĭefinition: the duration of an optical pulseĬategories: light detection and characterization, optical metrology, light pulses