Recent content by baptiste

Yes OK I see If we take the given solution, we have Ldf/dx=1/L (cosh(f/4)) sinh(f/4) then by some trigonometric transformation we get L df/dx=+/- sqrt(2 cosh(f)-2). So the solution is true. I will read the article one more time to find where is the bug in my simulations. And I will try to...

Yes you are right, f is a single variable function, so the equation is L2d2f/dx2=sinh(f) Sorry for the error. So I tried to derivate the expression tanh(f/4)=exp(x/L) tanh(f0/4) or f=4*atanh(exp(x/L) tanh(f0/4)) two times (both forms). That leads to huge expressions which have nothing to do...

Hello I have a physics article who solve Poisson equation of the form: L2 ∂2f/∂x2=sinh(f) The proposed solution is: tanh(f/4)=exp(x/L) tanh(f0/4) with f0 a constant I suspect an error, something like a forgotten factor. How can I verify? (I tried but I failed) I forgot the limit...

Dear Alpharup Thank a lot for your answer. I had a look to the wikipedia article. However, I still don't understand fully your advices. Presently, I have no feedback from the acousto optical modulator, but I would like to build one (with a photodiode), which should mesure the phase shift...

Hello. I am currently modifying a semiconductor experiment. A laser beam is modulated with an acousto-optical modulator and illuminate the semiconductor sample. The sample is probed by microwaves. The reflected microwave signal go through a demodulator, and then in a lock-in amplifier. Then I...

Hello. My name is Baptiste. I just finished a PhD in semiconductors science. I also just dicovered physiscs forum today. My goal is to get answer to some technical problemes I encounter and to give a help if possible to other people. Sincerely