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| Full Name | sardar bahadori |
| Organization | Gunma University (Japan) |
| Job Title | Ph.D student |
| Country |
Forum Replies Created
Dear Damian,
Thank you very much for your support.
Dear Sreve Dods
Perfect information. Thanks in advance.
Would you please tell me how can I apply the eigen function from “starting field” in “file section”(I don’t want to use modal or gussion or rectangular for starting field)!
Sardar
Dear Sreve Dods
Perfect information. Thanks in advance.
Would you please tell me how can I apply the eigen function from “starting field” in “file section”(I don’t want to use modal or gussion or rectangular for starting field)! Also where Can I put arbitarity refractive index as well.
Finally as I said about my research I still didn’t get your point about choosing right cladding and substrate size .Would you please check attachment and support me! Imaging I have a box (40mm*20 mm*30 microns)with refractive index of 1.42. Inside of this box there is mach-zehnder waveguide with refractive index of 1.43 in depth of 18microns from top.both materials are PDMS with different refractive index(1.42 for box and 1.43 for waveguide. In other words I cant understand cladding and substrate for this work and profile channel as well!
I still not sure about my simulation is correct or not. I did below steps:(wave guide size is 40mm for lenght and 20mm for width and 30microns for thickness. please check attachment to see size and gap between 2 arms are 300microns)
1.In profile designer I created 2 dielectric materials(cladding and guide with refractive index 1.42 and 1.43 respectively) for 2D and 3D isotropic. Then I made a profile channel and chosen guide for 2D profile definition and for 3D profile definition I made 1 layer that name are guide(thickness 8microns width 8 micons).
2. I designed Wafer properties as below:
A. Wafer dimension:length 40000 microns, width:350 microns.
B. 2D wafer properties: wafer refractive index section I chosen cladding.
C. 3D wafer properties: In sections of cladding and substrate material I chosen “cladding” with thickness 15 and 15 respectively( please tell me to fix this section correctly.
Your Sincerely,
Attachments:
Dear Steve,
Thanks for all your support. Would you please tell me Can Opti BPM calculate output field distribution(x,y,z-max) for an arbitrary input field E(x,y,0) and an arbitrary refractive index distribution n(x,y,z)
Your Sincerely,
Sardar
Dear Steve,
Thank you very much for all your support. As our work here is based on Proton Beam writing so I still not sure about my simulation is correct or not. I did below steps:(wave guide size is 40mm for lenght and 20mm for width and 30microns for thickness. please check attachment to see size and gap between 2 arms are 300microns)
1.In profile designer I created 2 dielectric materials(cladding and guide with refractive index 1.42 and 1.43 respectively) for 2D and 3D isotropic. then I created (Would please tell me what should be profile channel why we we need profile channel?. I really confused about profile channel.) By the way I made a profile channel and chosen guide for 2D profile definition and for 3D profile definition I made 2 layers that name are guide(thickness 8microns width 8 micons) and cladding( thickness 30 microns width 400 microns)
2. I designed Wafer properties as below:
A. wafer dimension:length 40000 microns, width:400 microns.
B. 2D wafer properties: wafer refractive index section I chosen cladding.
C. 3D wafer properties: In sections of cladding and substrate material I chosen “cladding” with thickness 18 and 12 respectively(As waveguide is in the depth of 18 microns with 8 microns thickness please tell me to fix this section correctly. Imaging I have a box (40mm*20 mm*30 microns)with refractive index of 1.42 and inside of this box there is mach-zehnder waveguide with refractive index of 1.43 in depth of 18microns from top.both materials are PDMS with different refractive index(1.42 for box and 1.43 for waveguide).
3. In top of this box I want to put 1 electrode on just above of one of the arms.(A like as attached) please tell me how can i put just 1 electrode on 1 arm ( I tried a lot but confused in electrode section totally)
Your Sincerely,
sardar
Attachments:
Dear Steve,
(I think you didn’t see this reply)
Thank you very much for all your information. As I changed refractive index of cladding I seen optical field has less flactuating. what do you think? in my work refractive index should be (wavegude:1.48 and cladding:1.42) but in this simulation I increased refractive index of cladding to 1.475 and it seen fluctuating decreased(Any idea). Also would you please tell me how can i get result for 3D. As my waveguide should be in depth of 18 (whole thickness is 30 microns). I followed your instruction for deleting one arm and yes you were right. I highly appreciate if you see attachment and let me know about your comments in case to having better out put. About power ration i mean (power ration:output/input)
Your Sincerely,
sardar
Attachments:
Dear Steve,
Regarding previous questions I also would like to know about of below questions:
1.How much is proton micro beam(eKv) and beam fluence(nC/mm2)?
2. Would you please tell me about power ratio ? How can I have such that data?
Your Sincerely,
Sardar
Dear Janvit Tippinit,
The new version of BPM do not support 2D simulation. You should try to find old version or buy full access to new version(contact with company to confirm your order and request before buy it).
Your Sincerely,
Sardar
Dear Steve,
Thank you very much for all your information. As I changed refractive index of cladding I seen optical field has less flactuating. what do you think? in my work refractive index should be (wavegude:1.48 and cladding:1.42) but in this simulation I increased refractive index of cladding to 1.475 and it seen fluctuating decreased(Any idea). Also would you please tell me how can i get result for 3D. As my waveguide should be in depth of 18 (whole thickness is 30 microns). I followed your instruction for deleting one arm and yes you were right. I highly appreciate if you see attachment and let me know about your comments in case to having better out put.
Your Sincerely,
sardar
Attachments:
Dear Steve,
Thank you very much for taking time and reply my questions.
About electrodes on Mach-zehnder waveguide I almost solve the problem but does there any thing to measure heat and shows it? what is physical parameter for this arbitrary unit(Optical power or electrical field power?) I removed the electrodes and did more than 100 times 2D simulation and results is attached in this comment for 2d simulation. The optical field in arms is too fluctuating. Could you please take a look and let me know about your comments?( The mach-zehnder waveguide structure and size is attached in above comments)
Your Sincerely,
sardar
Attachments:
Dear Mr.Steve Dods,
Thank you very much for your reply. Would you please answer the rest of my questions as below:
1. Does there any limitation for size of the optical waveguide? As in lesson 14 it mentioned” The whole switch device will be about 33 mm long and will not be more than 100 microns wide.” because the waveguide I want to design has 40mm length and 300 micros wide!(please check attachment.40mm*20mm*30microns)
2. Would you please tell me about adjustment for 2D and 3D isotropic simulation? like as” channel pro( in my design optical waveguide should be in depth of 18 microns and thickness of waveguide is 30 microns. B:Amount of mesh, BPM solver and boundary condition? C:Input plane?
3.How can i put electrodes like as attachment on this waveguide?
4. How can I able to see power ratio in unit of watt and intensity of output.
Your Sincerely,
sardar
Attachments:
Dear Dr. Sahil Singh,
Regarding this design I have problems as below:
1. Why should we use diffuse material for design Mach-Zehnder waveguide while in our laboratory its designed with PMMA and PDMS?(refractive index:1.42 for cladding and 1.48 for waveguide)
2. Can you tell me about input plan and measure is exist there! For 2D and 3D simulation please tell me as well. I need both 2D and 3D simulation relatively.
3. Please write for me your steps when you doing design.
Your Sincerely,
Sardar Bahadori
Attachments:
Dear Dr. Aabid baba,
There is many issue regarding work with Opti BPM. If you look at lesson 14 you will see there is limitation for using wafer size!!(L33mm,W:100 Micro). Also I attached for you before a simulation about 1 MZ waveguides. Here I attached it again. In case of my design i don’t want using diffuse material!!and I m still confused about cladding and core in this case. What do you thunk?
Your Sincerely,
sardar