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Design for Test rules

  • All design submissions must follow the Design for Test (DFT) rules. Three optical interfaces are available: surface grating couplers (GC), facet-attached micro-lenses (FaML), and facet-attached vertical emitters (FAVE).
  • Wavelength for testing can be 1310 or 1550 nm, swept over a range of +/- 30 nm

Grating Couplers

  • area design maximum: 1000 µm wide, 500 µm high
  • grating coupler cells:
    • SiEPIC_EBeam_PDK -> EBeam-SiN ->
      • GC_SiN_TE_1310_8degOxide_BB
      • GC_SiN_TE_1550_8degOxide_BB
      • should be facing right
  • 127 µm pitch, verically aligned, single column, connected circuits
  • up to 4 grating couplers
  • The grating coupler that is second from the top should be labeled with an opt_in_TE_1550_device_designerUniqueIndentifier label on the Text layer; it will be connected to the swept tunable laser
  • opt_in label format: opt_in_TE_1550_device_designerUniqueIndentifier
  • opt_in label location: the tip (0,0) of the grating coupler cell at the input
  • Fiber Array test consists of:
    • 1 (top GC): output, to detector
    • 2: input, laser
    • 3: output, to detector
    • 4 (bottom GC): output, to detector
  • See example: EBeam_LukasChrostowski_MZI_1550.oas

Facet-attached Micro-Lenses (FaML)

  • area design maximum: 1100 µm wide, 500 µm high
  • FaML coupler cells:
    • SiEPIC_EBeam_PDK -> EBeam-Dream ->
      • ebeam_dream_FaML_SiN_1550_BB
      • should be facing right
      • left edge of the chip (the cell includes 100 µm of deep trench)
  • 127 µm pitch, verically aligned, single column, connected circuits
  • up to 4 lenses
  • opt_in label format: opt_in_TE_1550_FaML_designerUniqueIndentifier
  • opt_in label location: at the chip edge (0,0) of the FaML cell, at the laser input
  • Fiber Array test consists of:
    • 1 (top FaML): output, to detector
    • 2 (middle FaML): input, laser
    • 3 (middle FaML): output, to detector
    • 4 (bottom FaML): output, to detector
  • Filename: must contain FaML, so that it recognized and placed on the edge
  • See example: EBeam_LukasChrostowski_MZI1_1550_FaML.oas

Facet-attached Vertical Emitters (FAVE)

  • area design maximum: 1000 µm wide, 500 µm high
  • FaML coupler cells:
    • SiEPIC_EBeam_PDK -> EBeam-Dream ->
      • ebeam_dream_FAVE_SiN_1550_BB
      • should be facing right
  • The FaML cell contains the Thermal Isolation Trench layer, which needs to be 30 µm away from SiN -- both within the design, as well as neighbour designs.
    • Left & Right side: 22 µm away from the FloorPlan (additional space between designs will be added during merging)
    • Top & Bottom: 9 µm away from the FloorPlan (additional space between designs will be added during merging)
  • 127 µm pitch, verically aligned, single column, connected circuits
  • up to 4 emitters
  • opt_in label format: opt_in_TE_1550_FAVE_designerUniqueIndentifier
  • opt_in label location: the waveguide opt1 port (0,0) of the FAVE cell, at the laser input
  • Fiber Array test consists of:
    • 1 (top FAVE): output, to detector
    • 2 (middle FAVE): input, laser
    • 3 (middle FAVE): output, to detector
    • 4 (bottom FAVE): output, to detector
  • See example: EBeam_LukasChrostowski_MZI_1550_FAVE.oas