State of beam profile in a system

Question

Hi everyone, I need your kindness help for some problem about the beam profile in my system.
I have two questions about the state of the beam.
I have made the optical system as shown in the picture below.

1)By setting the apodization type only to Gaussian, can I assume that the beam profile in my system is a Gaussian beam?
 
I have use POP to create the gaussian beam as our laser source as shown in picture below. And this shows that my system is in Gaussian distribution.

But, instead of use POP to setting the Gaussian beam, can I just setting the aperture type in system explorer as mention above to describe my system is in Gaussian beam?
 
2)For now, I am using Grid Phase in Surface Type and changing the state of beam condition by importing DAT file. Instead of using Grid Phase or Grid Sag, is there any other way to change the beam condition?
 
If anyone can help me in order to solve the problems, I really appreciate for your kindness.
Thank you.

Sandrine Auriol · Accepted Answer

Hi!1) The apodization in the System Explorer basically changes the distribution of the rays in the pupil. Instead of having a uniformly distributed pupil, we are going to select more rays close to the center so that if we plot the number of rays vs radius of the pupil it will show a gaussian distribution. Check our help file The Setup Tab > System Group (the Setup Tab) > System Explorer > Aperture (System Explorer) > Apodization Type. So the beam will be gaussian but will be treated in terms of geometrical optics, so just rays.2) POP is a separate mode where you propagate a beam defined in the beam definition. That beam propagates along the chief ray but apart from that, the propagation is done separately from the 'geometrical' mode. For more information, I would recommend checking our learning path: https://my.zemax.com/en-US/learning-paths/modeling-laser-beam-propagation-in-opticstudio/3) Last point you are mentioning using Grid Phase or Grid Sag. What is the effect of those surfaces on your beam? Just checking so I can give you a relevant answer. Thank you.Sandrine

Kosuke.Kimura · Answer

Thank you for your answer Ms. Sandrine.For question 3, we put grid phase that act as wavefront aberration, so that the beam profile (gaussian beam) will be effected by this wavefront aberration.I want to ask on how to create a beam with an arbitrary intensity distribution. My aim is to created a deformed beam profile as my laser source. For example, surface 1 in my system is not gaussian distribution but the deformed beam. Before this, I used Grid Phase to created the deformed beam, but i want to know other methods that i can used to created the deformed beam from the beginning of my system. Actually, I have taken the beam profile data from my experimental system, then, i want to import the taken beam profile into my system in Zemax as the laser source. So i want to know the method on how to import the taken data instead of using grid phase.I would like to hear from you again, thank you.

State of beam profile in a system

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