Yes and 266nm is the 4th while 213nm is the 5th the 5th requiring an additional BBO crystal and the mixing of the 2nd and 3rd harmonic radiation but the video said that no additional crystal is needed for the 3rd harmonic generation of 355nm which is interesting.355nm is the third harmonic of 1064nm.
In this system, 5th harmonic requires the mixing of the 2nd and 4th harmonicsYes and 266nm is the 4th while 213nm is the 5th the 5th requiring an additional BBO crystal and the mixing of the 2nd and 3rd harmonic radiation but the video said that no additional crystal is needed for the 3rd harmonic generation of 355nm which is interesting.
This system makes everything super easy, literally bolt on the harmonic generator and press a button on the controller for automatic phase matching.3H is sum frequency mixing of 1064 with 532. First crystal converts 1064 to 532 while being detuned or beam split to pass some 1064. Second crystal mixes them to produce a modest amount of 355. If the crystals are cut at the correct orientation, it is quite easy to get 355 going, once you have the green conversion well tuned and efficient.
266 on the other hand is difficult to get right. In most systems the crystal used is sensitive to adsorption heating by the 266 generated, and the crystal is both temperature and angle tuned. For the systems I worked on, it was adjust the crystal, wait 20 minutes, adjust the crystal, wait 20 minutes and so forth, so about an hour later I had stable 266 conversion provided I did not adjust the flashlamp energy or the pulse width. If the experiment required a change in delivered power level, well, lather, rinse, repeat...
Hopefully this laser has that automated.
The OP needs to order a OPO Next, dial a color, pumped by the 355 nm light, is very fun. We had something like 420 to 2500 nm tunable with 1.5 nm steps, from the OPO... I loved installing the OPOs, they are surprisingly simple to build if you have a lot of 355 nm pulsed power to pump them, two crystals on stepper motors and four mirrors and a beam splitter... Hey, guess that wavelength, was fun... If you work with enough visible laser lines, your eye gets pretty good at GTW...
Pulsed, unfocused, 355 eats crystalline materials, laser housing paint, and fold mirrors, and business cards, and black absorbers, and woe betide you if it hits a signal or power cable. The 266, despite having far more energetic photons, not so much.
Be careful with these strong, short pulses, eye damage is easy. Watch the corneas with the UV, you do not want your corneas to turn white..
You have enough power there to do air breakdown if there is dust in the air, and to microcrack the glass in lenses if the focus gets too tight. Be careful.
We are developing several different devices in the dermatology/aesthetics spaceLooks very nice. What sort of experiments are you doing with it?