Thank you very much for these lectures! It's quite difficult to find something on this Quality Level in the web. Another thing missing, are practical hints for aligning laser cavities, reducing parasitic reflections and hands on session designing a DPSS (not a HeNe).
Sir, Your lecture is incredibly informative and helped me gain an intuitive understanding of Q Switching. I have one question. Pardon me if I missed something out from a previous lecture, but as covered by you, Continuous wave laser achieves much deeper penetration of a material. So, why don't we just use Continuous wave instead of pulsed LASER for achieving penetration of a material.
Great lecture! However I've got a probably naive practical question: I've got a 35mW 473nm laser. When I film it with my iPhone6s camera (holding it close to the operating laser), a noise can be clearly heard when I watch the video. The noise is kind of well known, it reminds films about radiation. Question is: does this sound likely detect radiation (in a common sense)? What kind of particles are likely to cause the sound? Is it sort of expected to happen or more likely probably indicates an issues with the device? How dangerous could it be considering those few characteristics of the laser that I mentioned? Thanks a lot.
I wonder how a laser light would react if pointed inside a "Tesla turbine." Would the light also have a sort of "Boundary Layer Effect" following the fluid path (water) ultimately reflecting out? ..
