kithminrw / UBC-ELEC413-2023

UBC Electrical and Computer Engineering ELEC413 Semiconductor Lasers undergraduate course

UBC-ELEC413-2023

The course project is to design a photonic integrated circuit that connects to an on-chip semiconductor laser.

This repository contains the merging framework and template example circuits.

Submission details

• Submissions into the fabrication run are done by Pull Requests from forks of this repository

Detailed Instructions for your creating and uploading your layout:

• Follow the instructions to install the SiEPICfab EBeam ZEP Process Design Kit, implemented in the open-source KLayout software and the SiEPIC-Tools Python plug-ins.

• Install GitHub Desktop, https://desktop.github.com

• Fork this repository

• Clone the repostory fork using GitHub Desktop. Do this by clicking on the green "Code" button, then "Open with GitHub Desktop"

  • Example below assumes it is installed in your Documents folder.

• in KLayout:

  • Create a new empty layout choosing Technology = SiEPICfab_EBeam_ZEP
    • you should see the layer table, and the SiEPIC menu
  • Install the forked project repository
    • menu Tools > Macro Development
      • click on Python
        • in the window below, right-click and choose Add Location, then find the UBC-ELEC413-2023 folder
        • open the file UBC_ELEC413_TLDS_resonators
      • Run it using the Play! button. You should see a layout with a laser and several individual designs

• Create your own design

  • in the Tools > Macro Development, find the folder UBC-ELEC413-2023/Layout/Designs
  • right-click on the folder, New, then Plain Python file (*.py)
  • type in the filename for your own design file, e.g., design_lukasc
  • open the file design_student1, select all, and copy the code
  • paste the code in your design file
  • replace "def design_student1" with "def design_lukasc" (the name has to match your filename exactly)
  • edit the script to create a design as you like

• Compile the layout generation code

  • open the file UBC_ELEC413_TLDS_resonators
    • Run it using the Play! button. You should see a layout with a laser and several individual designs
  • Debug, and complete the design

• Upload your design to GitHub

  • First upload it to your own Fork
    • in GitHub Desktop, choose the UBC-EELC413-2023 repository
    • In the "Changes" tab:
      • Change the selection of files: remove the merged layout files: Layout/UBC_ELEC413_TLDS_resonators*
      • bottom left, enter a summary (e.g., your name),
      • click "Commit to main"
    • top right: Fetch Origin
    • top right: Push Origin

• Make a Pull Request to get your design into the master course repository

  • Pull Requests from forks of this repository

  • Keep your local copy in sync with the online version:

    • Fetch - GitHub Desktop:
    • Current Repository = UBC-ELEC413-2023
    • top right: Fetch Origin

Bragg grating design tips

• Simulate the Bragg grating using ideal geometry (e.g., 350 nm width)
• Fabrication process bias information is available in these slides. Increase the size the Bragg grating to compensate for the fabrication process (e.g., increase by 36 nm, from 350 nm to 386 nm).