We have found and analyzed dependencies of the nanocrystals’ size and concentration on the laser pulse intensity for 10 ns and 150 μ m duration laser pulses at the wavelengths of 535 nm and 1070 nm. If a laser is able to oscillate in many longitudinal modes, such short pulses can be produced with the so-called mode-locking technique. The influence of laser power and the freguency of pulse generation on the surface treatment area (laser spot diameter of 0.3 mm, laser pulse duration of 6 ms, treatment time of 3 s) In this case the repetition rate can be varied from CW up to 1 GHz. 100% modulation...Join ResearchGate to find the people and research you need to help your work.© 2008-2020 ResearchGate GmbH. In optics, an ultrashort pulse of light is an electromagnetic pulse whose time duration is of the order of a picosecond (10 second) or less.

For full-text searches on the whole website, use our Note: the article keyword search field and some other of the site's functionality would require Javascript, which however is turned off in your browser.There are actually different definitions of a pulse duration:Pulse durations down to roughly 10 ps can be measured with the fastest available The spatial width of a pulse in the propagation direction is given by the While pulses with durations of nanoseconds or longer hardly experience any changes of pulse duration during propagation even over long distances, ultrashort pulses are sensitive to various effects:The definition and measurement of the pulse duration becomes considerably more complicated in cases where spatial and temporal pulse properties are coupled with each other. Data.What is the difference between continuous wave and pulse laser light?What's the real difference between pulse and continuous wave laser output ? Pulse durations from Q-switched lasers typically vary between 100 ps and hundreds of nanoseconds. There are also several papers. For low fluence values, the physics involved in this process is like the standard fluid LIFT. We use a direct low frequency generator on the our CO2 electric supply device. CW or pulsed laser: Pulse Energy (Joules) = Average Power (Watts) * Pulse Duration (Seconds) Again, let’s use some real values and assume you are working with a CW laser that outputs 500 W. If you fire this laser at an object for exactly 5 seconds, then you have 500 W * 5 s = 2500 J. In comparison to 1 µm wavelength, the variety of focussing optics is limited because of the required optical material (mostly ZnSe, Ge).We already did a lot of investigations concerning CO2 lasers and glasses, the generation of CO2 laser pulses etc. Ultrafast lasers are generally defined as lasers that produce pulses in the range of 5 fs to 100 ps (1 femtosecond = 10 −15 seconds). The characteristics of incident beam is 500KW peak pulse power, 8Ons pulse width and 10Hz repeat pulse. One pulse energy is ca.40mJ. The divergence of the laser beam is variable and therefore, I would like to know if there is a relation of the spot with the power of the laser so that it is practical to calculate the spot of the laser.We have developed a fiexible CO2 laser beam guide with metal and polymer compound hollow tube. Or what is the minimum beam waist after it is focused?

I will drop you a few lines for a further discussion shortly. An example is the phenomenon of Pulse durations and many other properties of ultrashort pulses can be conveniently measured with our The intuitiveness of the d-shot trace provides instant visual feedback for the optimisation of your source. Such pulses have a broadband optical spectrum, and can be created by mode-locked oscillators. (See also our By submitting the information, you give your consent to the potential publication of your inputs on our website according to our If you like this page, please share the link with your friends and colleagues, e.g.

YLPN-0.3-A1-18 models provide 1, 5 and 10 ns pulses while YLPN-1-1 × 130 models provide adjustable pulse waveforms in the range of 1 to 130 ns. I'd imagine there are ns CO2 laser out there. we developed a q-switched CO2 laser with a minimum pulse duration of about 50-100 ns, which is also commercially available.