Photonics

Photonics

What does DM laser do? Why am I getting one signal that looks like square wave but not exactly?

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    • Love
      Subscriber
    • Kyle
      Ansys Employee

      Regarding the DM Laser, this element uses a dynamical laser model to determine the output power as a function of time. The model is described on this element's documentation page:
      For the second question, is this the result from the oscilloscope after the waveguide? If so, yes, I think this is because the loss is very high in the waveguide. With a loss of 300 dB/m and a length of 1 m there will be a 300 dB loss, which will essentially result in zero transmission.
    • Love
      Subscriber
      Hi, kjohnson Thank you for replying to me. I wonder why there is a spike in the first transmission graph.
    • Kyle
      Ansys Employee

      The spike must be due to the dynamical laser model. It looks like there is some ringing behaviour after the modulation is changed abruptly before settling into the steady state laser output power.
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