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Kerr-lens mode-locking (KLM) is a method of mode-locking lasers via the nonlinear optical Kerr effect. This method allows the generation of pulses of light with a duration as short as a few femtoseconds. The optical Kerr effect is a process which results from the nonlinear response of an optical medium to the electric field of an ...
One of the most successful schemes is called Kerr-lens mode locking (KLM), also sometimes called "self-mode-locking". This uses a nonlinear optical process, the optical Kerr effect, which results in high-intensity light being focused differently from low-intensity light. By careful arrangement of an aperture in the laser cavity, this effect can ...
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Kerr-lens modelocking (KLM), the use of self-focusing as a mechanism to mode-lock laser. Self-phase modulation (SPM), an effect due to the optical Kerr effect (and possibly higher-order nonlinearities) caused by the temporal variation in the intensity creating a temporal variation in the refractive index.
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One important property of Kerr frequency combs, which is a direct consequence of the small dimensions of the microresonators and their resulting large free spectral ranges (FSR), is the large mode spacing of typical Kerr frequency combs. For mode-locked lasers this mode spacing, which defines the distance in between adjacent teeth of the ...
Equipping himself with a longer zoom lens, he created this image using a 30-second exposure. The result shows a burning fire to the right and the trails of light from shelling directed at southern ...
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