Aydin Ashrafi-Belgabad

9 Questions 32 Answers 0 Followers

Questions related from Aydin Ashrafi-Belgabad

Suitable Camera for GRENOUILLE?

Hi there, I hope you are doing well. Do you know, which camera is used recently for the GRENOUILLE technique in order to measure the pulse length of ultra-short pulses? what features the camera...

09 March 2022 9,004 4 View

How using linear polarizer increase the resolution of optical imaging systems ?

Hi there, I hope you are doing well. I am working with imaging systems. I am confused about the effects of linear polarizer in such systems ( I mean how a linear polarizer can improve the...

22 December 2019 5,390 6 View

What are differences among COLTRIMS and Velocity Map Imaging (VMI) and TOFMS?

Hi there, I hope everything goes well. I want to be familiar with molecular dynamics and Coulomb Explosion Imaging (CEI). Could you please explain what COLTRIMS, VMI and TOFMS do? and in which...

09 November 2018 1,290 1 View

Kerr lens mode lock in femtosecond ti:sapphier lasers!!!?

Hi there, I hope every thing goes well. As we know there are some techniques in generating ultra short pulses such as active mode lock (Acousto-optic / Electro-optic modulator) and passive mode...

04 November 2018 7,529 25 View

How we can prove that the irradiance of frequency doubled beam varies with theta when phase matching condition in uniaxial crystals is not obeyed?

Hello everyone. there are different type of relationship to calculate the phase matching angle, I bring two of them in attached, which I can derive the second one. and we found that the first...

14 July 2017 9,202 1 View

Does anyone work on chaotic systems?

Hi I'm working on chaotic systems. I write MATLAB code with RK4 and plot the lyapunov exponent and phase space and poincare section, but I have a problem in drawing bifurcation diagram. Could...

04 February 2017 224 8 View

Does someone know how we can calculate absorption coefficient in optical fiber at different wavelengths?

Hi Does someone know how we can calculate absorption coefficient in optical fiber at different wavelengths (such as 1117 nm).

12 September 2014 2,025 11 View

Does anyone know how the filling factor for stimulated Raman scattering is calculated in fiber lasers?

Hi For solving the steady state rate equation in fiber lasers to find the threshold power of Stimulated Raman Scattering we need to calculated filling factor of pump, signal and stokes wave(Raman)...

12 September 2014 3,541 1 View

Can someone suggest where to find liekki application designer(LAD) tutorial?

liekki application designer(LAD) is a versatile design tool for high power applications providing a strong platform for simulating and optimizing fiber amplifiers, amplify spontaneous emission...

15 October 2013 241 2 View