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Typically for the wavelength band, power requirements and pulse duration you mention, Ti:Sapphire lasers are employed. AFAIK it's not uncommon to use the electro-optically shuttered output of a regeneratively mode-locked Ti:Sapphire as a seed for an ultrafast regenerative amplifier. For example, a Spectra-Physics Spitfire Ace regenerative amplifier can be ...

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There is no one focal point. It is more like a focal axis. The whole longitudinal centre line of the cylinder are focal points. this means you can line up many diodes from top to bottom as long as they are in the middle of the cylinder. Because the detector is a flat plane, you can only utilise 180 degrees of the cylinder per diode (light coming from the ...

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Brief Overview: The chemist puts a laser on a sample. The atoms in the sample gain energy and for a few nano seconds it shines a light and returns to ground state. People such as agricultural inspectors use this to indentify any chemi

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One thing to note is that it is not just the crystal, but a crystal which is coherently pumped by a strong laser field in which one sees SHG. In this setting, the pump creates a periodic modulation of the index of refraction (thus the requirement for a non liner medium) which effectively acts as a phase grating. One way of thinking about SHG is that it is ...

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The answer to your question is generally yes, but it depends on how the AOM is driven. Typically AOMs have a piezoelectric transducer on one side of the crystal. In this case the frequency of the diffracted beams is shifted; if the laser frequency is $\omega_0$ and the modulation frequency is $\omega_m$, then the light in the first order beams will have ...

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Answer from 2C Solar: There are many 3D packages that render light aka raytracing, however most don't show the light itself. One very old method is POVray, started in 1991 and latest version 2013 The 3d package Spaceclaim can be used to create your laser / mirror model then export to POVRay where you need to define the properties. Bit of a learning curve ...

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The acoustic wave in the material causes a variation in refractive index and the amount of light scattered at a particular angle (its similar to Bragg scattering) depends on the intensity of the modulation. The scattered light does carry both frequencies in the form of blue or red shifting. It shifts by mf where f is the driving frequency and m is the order. ...

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Barring any other information, I'll tell you what I think equivalent temperature means in this case. In a laser gain medium (such as Rubidium) the atoms are put into a non-equilibrium excited state referred to as a population inversion. In an equilibrium treatment of thermodynamics it is impossible for a system to reach such a state because even at ...

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One of the simplest measurements you can do is to characterize the spatial mode coming out of the laser. This can be done with a simple photodiode and a scanning slit (optical chopper or razor blade mounted on a movable stage). I wrote a brief note on making such a measurement here. This isn't the most interesting of measurements if you aren't going to ...

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You might try measuring the temporal coherence of the laser. (This came to mind 'cause it's closely related to the PhD work I would have done if I didn't quit with an ABD :-( ). Basically, you split the beam with, e.g., a 50-50 splitter, and recombine one way or another to get an intereference pattern. Then use an "optical trombone" (the meaning should ...

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Temperature sensitivity, beam divergence, spectral purity, power, beam shape, beam profile.

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