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Lesson 14 – questions…

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(joined August 2014)
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Dear Optiwave team and forum members,

Trying to understand lesson 14 from tutorial and have following questions about it:
1.Which wafer’s and material’s properties exactly are we taking into consideration when we choosing diffusion depth and length?
2.Why we displacing the electrodes with the respect of waveguides? When exactly should we use buffer for the electrodes?

Will be very thankful for any advice!

Responses (3):

    • #15609
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      Ravil
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      Dear Optiwave team and forum members,

      Trying to understand lesson 14 from tutorial and have following questions about it:
      1.Which wafer’s and material’s properties exactly are we taking into consideration when we choosing diffusion depth and length?
      2.Why we displacing the electrodes with the respect of waveguides? When exactly should we use buffer for the electrodes?

      Will be very thankful for any advice!

    • #15683
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      Ravil
      Participant

      Can anybody see this topic?

    • #15705
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      Steve Dods
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      Lesson 14 presents an example of waveguides made by diffusion into lithium niobate. The definitions for horizontal and vertical diffusion lengths can be found in the OptiBPM User Reference on pages 423 – 424. The electric field is strongest between electrodes, not on them. Therefore, to obtain the strongest field in the waveguide, the electrodes are placed on each side of the waveguide. I’m not sure why the buffer was considered necessary for the simulation. However, it seems it appears often enough that OptiBPM should be able to incorporate it in simulations.

      +2
    • #15706
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      Ravil
      Participant

      Thanks for your reply, Steve. I’ll check the reference pages.

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